Trust

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Zscaler Client Connector for VDI Deployment Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zslogin.net

Fri, 17 Apr 2026 00:00:00 GMT

Zscaler detected an issue where the existing access token that was generated before April 11 can not be used to deploy Zscaler Client Connector. As a workaround customers can create a new access token while the Zscaler team investigates and fixes the issue.

Affected Services: Zscaler Client Connector for VDI

Workaround:
- Generate a new access token from the Cloud and Branch Connector portal (Administration > VDI Templates) and use the new token for any new deployments
- For non-persistent VDI where no users backup/restore was implemented: Update the golden/master image with the new access token, this is critical since the agent re-enrolls on every boot.

Root Cause: Central Authority (CA) certificate update caused this issue.

Urgent Scheduled Maintenance - zscalerone.net

Fri, 17 Apr 2026 08:14:51 GMT

Zscaler is performing a service upgrade on Saturday at 6:00 AM PDT on April 18, 2026 (Saturday, April 18, 2026 , 01:00 PM UTC), and is expected to last up to 4 hours.
During this maintenance period, the Zscaler Client Connector Portal will be in maintenance mode. As a result, access to policy management and reporting will not be available. Existing devices that are already enrolled will not be affected, but there may be intermittent failures in registering new devices. Rest assured, all logs will be collected and made available once the maintenance mode window concludes.

Update - Sat, 18 Apr 2026 17:11:59 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Helsinki I (HEL1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Thu, 16 Apr 2026 18:35:24 GMT

Zscaler will be performing hardware maintenance in the Helsinki I (HEL1) Datacenter.

Maintenance window,
Start: 2026-04-17 21:00 EEST
End: 2026-04-18 01:00 EEST
(i.e. 2026-04-17 18:00 - 22:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

Update - Fri, 17 Apr 2026 20:03:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Stockholm III (STO3) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Thu, 16 Apr 2026 18:33:41 GMT

Zscaler will be performing hardware maintenance in the Stockholm III (STO3) Datacenter.

Maintenance window,
Start: 2026-04-17 20:00 CEST
End: 2026-04-18 00:00 CEST
(i.e. 2026-04-17 18:00 - 22:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

Update - Fri, 17 Apr 2026 20:05:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Risk360 – Data Loading issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zscalerrisk.net

Thu, 16 Apr 2026 17:45:33 GMT

Zscaler is currently investigating an issue causing computation delays. Latest risk scores and insights may be outdated or unavailable at this time. During this time, your dashboard may reflect historical data; however, your actual security posture and traffic protection are unaffected. We are currently validating a performance optimization and will restore real-time scoring. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A defect in a connector processing workflow caused intermittent run failures, resulting in delayed data updates.

Latest Update - Tue, 21 Apr 2026 04:35:45 UTC

Update - Thu, 16 Apr 2026 18:31:45 UTC

We have identified the root cause of the issue and working on resolution.

Update - Thu, 16 Apr 2026 22:16:02 UTC

Zscaler continues to work toward full resolution of the issue while actively validating mitigation measures. Further updates will be provided as progress continues.

Update - Fri, 17 Apr 2026 12:43:57 UTC

Zscaler continues to work toward full resolution of the issue while actively validating mitigation measures. Further updates will be provided as progress continues.

Update - Sat, 18 Apr 2026 14:20:47 UTC

Zscaler continues to execute mitigation actions to restore full Risk360 functionality. Resolution is taking longer than initially anticipated as teams work through multiple dependencies required to fully restore normal data updates. Zscaler teams remain fully engaged, with continued progress in stabilizing data processing and improving data update timeliness. Further updates will be provided as progress continues. Further updates will be provided as progress continues.

Update - Tue, 21 Apr 2026 04:35:45 UTC

Zscaler identified and corrected an issue affecting a backend workflow. Following a monitored, phased re-enablement across all environments, normal processing has resumed and the incident is now resolved.

UI Node will stop supporting Public API Traffic - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 16 Apr 2026 00:00:00 GMT

Zscaler is announcing the official retirement of UI nodes for servicing Public API traffic. Currently, some Public API traffic lands on UI nodes instead of the designated Zscaler API (ZSAPI) nodes.

To ensure optimal performance and alignment with our architectural standards, UI nodes will stop servicing Public API calls starting September 01, 2026. This follows the initial announcement of the ZSAPI framework transition made in April 2021 under the section Updates to Cloud Service API.

Customer Impact

Any automation scripts, programs, or third-party integrations currently sending Public API traffic to UI nodes (`admin.<Zscaler Cloud Name>`) will no longer be supported after September 01, 2026.

Customers who have already transitioned to ZSAPI or OneAPI frameworks are not impacted.

Customer Guidance & Action Required

To avoid service disruption, all necessary changes must be completed by August 31, 2026. Customers have two options to mitigate this risk:

Option 1: Transition to OneAPI Framework (Recommended)

Zscaler recommends transitioning to the OneAPI framework, our new and unified automation framework for all Zscaler products.

Endpoint: `https://api.zsapi.net`
Getting Started: Refer to the Zscaler OneAPI documentation for migration guides and developer resources.

Option 2: Transition to ZSAPI Nodes (Legacy Framework)

Update your existing automation scripts or code to point to ZSAPI nodes instead of UI nodes.

Identify: Locate instances using `https://admin.<Zscaler Cloud Name>` for API calls.
Replace: Update the endpoint to `https://zsapi.<Zscaler Cloud Name>`.

Timeline

Initial Announcement: April 2021
Deadline for Customer Action: August 31, 2026
Retirement Date (End of Service): September 01, 2026

Urgent Maintenance - zscalerone.net

Thu, 16 Apr 2026 06:28:38 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 01:00 AM Pacific Time on April 17, 2026 (Friday, April 17, 2026 08:00 AM UTC), and can take up to 4 hours to complete.

Update - Fri, 17 Apr 2026 09:43:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI and User Authentication Issues - zscalerthree.net

Thu, 16 Apr 2026 03:51:49 GMT

Zscaler has detected an issue with the administration UI and user authentication on its zscalerthree.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- The preliminary root cause of this issue is attributed to a fault in the control plane.

Latest Update - Thu, 16 Apr 2026 04:33:48 UTC

Following a period of monitoring, the cloud environment has remained stable after the control plane recovered via built-in self-healing mechanisms. The incident is now resolved.

Update - Thu, 16 Apr 2026 04:06:56 UTC

Zscaler observed an issue affecting the control plane. The service recovered automatically via built-in self-healing mechanisms. The issue is now mitigated, and we are actively monitoring the cloud to ensure continued stability.

Update - Thu, 16 Apr 2026 04:33:48 UTC

Following a period of monitoring, the cloud environment has remained stable after the control plane recovered via built-in self-healing mechanisms. The incident is now resolved.

New Delhi I (DEL1) Datacenter Network Maintenance - zscloud.net

Wed, 15 Apr 2026 22:48:20 GMT

Zscaler will be performing hardware maintenance in the New Delhi I (DEL1) Datacenter.

Maintenance window,
Start: 2026-04-17 19:30:00 IST
End: 2026-04-17 23:30 IST
(i.e. 2026-04-17 14:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[NOTE: EXTENDING MAINTENANCE AN ADDITIONAL TWO HOURS]

Update - Fri, 17 Apr 2026 18:12:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming Data Center Expansion in Zpa - private.zscaler.com

Wed, 15 Apr 2026 21:48:46 GMT

As part of our regular expansion of capacity, we are adding additional ZPA Public Service Edge nodes to our existing data center in Chicago II (CHI2) for Zpa cloud.

These would be available anytime on or after April 15, 2026.

Region	Location	Notes
AMERICAS	CHICAGO II	Expansion of Existing DC

The IP addresses for the DC are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

Upcoming Data Center Expansions in ZpaTwo - zpatwo.net

Wed, 15 Apr 2026 21:46:53 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Chicago II (CHI2) for ZpaTwo cloud.

These would be available anytime on or after April 15, 2026.

Region	Location	Notes
AMERICAS	CHICAGO II	New DC

The IP addresses for the DC are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

Data Center Expansions in ZPATWO - zpatwo.net

Wed, 15 Apr 2026 20:52:31 GMT

Dear Zscaler Customer,

We would like to notify you of the public service edge expansions at the locations listed below. These were brought online recently.

Region	Location	Notes
APAC	Sydney V	New DC
EMEA	Warsaw II	New DC

The IP addresses for these DCs are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

Data Center Expansions in ZPA - private.zscaler.com

Wed, 15 Apr 2026 20:35:16 GMT

Dear Zscaler Customer,

We would like to notify you of the public service edge expansions at the locations listed below. These were brought online recently.

Region	Location	Notes
APAC	Sydney V	New DC
EMEA	Warsaw II	Expansion of Existing DC

The IP addresses for these DCs are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

New Delhi I (DEL1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Wed, 15 Apr 2026 17:53:40 GMT

Zscaler will be performing hardware maintenance in New Delhi I (DEL1) Datacenter.

Maintenance window:
Start: 2026-04-20 14:30 UTC
End: 2026-04-20 17:30 UTC
(Local Time 2026-04-20 20:00 - 2026-04-20 23:00 IST)

Update - Mon, 20 Apr 2026 15:15:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai II (MAA2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Wed, 15 Apr 2026 17:46:00 GMT

Zscaler will be performing hardware maintenance in Chennai II (MAA2) Datacenter.

Maintenance window:
Start: 2026-04-17 14:30 UTC
End: 2026-04-17 17:30 UTC
(Local Time 2026-04-17 20:00 - 2026-04-17 23:00 IST)

Update - Fri, 17 Apr 2026 17:04:15 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI and Mobile Admin Portal Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Apr 2026 08:40:30 GMT

Zscaler is currently investigating reported issues impacting the Administration UI and Mobile Admin Portal on the zscaler.net, zscalertwo.net, and zscalerthree.net clouds. Customers may experience intermittent slowness, timeouts, and/or increased latency when accessing the Admin UI and/or Mobile Admin Portal.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- Configuration processing led to resource constraints on Admin UI.

Latest Update - Thu, 16 Apr 2026 16:36:41 UTC

Update - Wed, 15 Apr 2026 09:23:44 UTC

Update - Wed, 15 Apr 2026 10:18:07 UTC

Zscaler is working to isolate the issue and identify the root cause. We have confirmed the issue is also occurring on other clouds, and we have updated the impact cloud accordingly.

Update - Wed, 15 Apr 2026 12:38:45 UTC

The Zscaler team has identified the root cause and is now applying a mitigation. The mitigation has been deployed to the zscaler.net cloud, and our testing indicates improved service performance; the zscaler.net cloud is now in a mitigated state. We are continuing to deploy the mitigation to the remaining clouds, with expected completion within 60 mins.

Update - Wed, 15 Apr 2026 13:37:18 UTC

The mitigation has been successfully deployed to zscalerthree.net, in addition to zscaler.net, and our testing indicates improved service performance. We are continuing to deploy the mitigation to the remaining clouds, with expected completion within 45 minutes.

Update - Wed, 15 Apr 2026 14:14:10 UTC

The mitigation has been successfully deployed to zscloud.net and zscalertwo.net, in addition to zscalerthree.net and zscaler.net. This concludes the mitigation rollout, and we are now moving the incident into a monitoring period to evaluate the effectiveness of these measures.

Update - Thu, 16 Apr 2026 16:36:41 UTC

Scheduled Maintenance on AMER region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Apr 2026 00:58:23 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the AMER region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Sunday at 2:00 AM Pacific Time on Apr 19, 2026 (Sunday, Apr 19, 2026 09:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sun, 19 Apr 2026 10:52:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on EMEA region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Apr 2026 00:51:46 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the EMEA region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 PM Pacific Time on Apr 18, 2026 (Sunday, Apr 19, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sun, 19 Apr 2026 03:19:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on APAC region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Apr 2026 00:49:45 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the APAC region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 AM Pacific Time on Apr 18, 2026 (Saturday, Apr 18, 2026 01:00 PM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Mon, 20 Apr 2026 04:20:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on Oceania region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Apr 2026 00:45:54 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the Oceania region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 2:00 AM Pacific Time on Apr 18, 2026 (Saturday, Apr 18, 2026 09:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 18 Apr 2026 10:00:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Performance Degradation Impacting Case Creation - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Tue, 14 Apr 2026 00:00:00 GMT

Zscaler is currently aware of a performance degradation affecting case creation, associated with a third-party service provider. At this time, core Zscaler services, including the data plane and control plane, continue to operate normally. We are actively collaborating with the impacted service provider, who has acknowledged the issue within their managed infrastructure and is working toward resolution. The service provider has identified the underlying cause and initiated remediation actions. Based on current guidance, full restoration is expected to take several hours.

Customer Impact: Affected customers may experience elevated response times when creating or updating records via the user interface or through integrations. In high-volume scenarios, this may also result in intermittent errors during transaction processing, including workflows such as case creation, live chat interactions, and automated flows.

Workaround: Customers requiring immediate assistance are advised to contact Zscaler Support via phone for expedited handling.

Zscaler is actively collaborating with the service provider and will continue to provide updates as more information becomes available.

Latest Update - Tue, 14 Apr 2026 22:00:57 UTC

The issue impacting case creation has been resolved. The service provider has implemented the fix and confirmed that services have been restored. Zscaler will continue to monitor the environment in collaboration with the service provider to ensure ongoing stability.

Update - Tue, 14 Apr 2026 22:00:57 UTC

Certificate Signing Request (CSR) Issue - zscaler.net, zscloud.net, zscalerthree.net

Tue, 14 Apr 2026 14:27:32 GMT

Zscaler is currently investigating reports of issues with the Administration UI on its Cloud. Some customers may be unable to create a new Certificate Signing Request (CSR) because the option is greyed out.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: A software defect in the Administration UI affected the visibility of controls required to add or renew custom intermediate SSL certificates; this was resolved through a platform update.

Latest Update - Wed, 15 Apr 2026 21:58:53 UTC

Zscaler has successfully deployed the fix across the affected cloud environment, and services have been fully restored. The platform is operating normally, and stability has been confirmed. Zscaler will continue to closely monitor the environment to ensure ongoing reliability.

Update - Tue, 14 Apr 2026 14:45:36 UTC

The Zscaler team has identified the issue as a software defect. Zscaler teams are actively prioritizing the incident, implementing the fix, and working to restore services.

Update - Wed, 15 Apr 2026 17:43:17 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 15 Apr 2026 21:58:53 UTC

Administration UI Issue - zscloud.net

Tue, 14 Apr 2026 14:01:07 GMT

Zscaler has detected an issue with the administration UI on its zscloud.net Cloud. Customers may encounter slowness issues logging into Administration UI and Zscaler Client Connector portal.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- A surge in authentication traffic to a specific Admin UI node caused performance degradation.

Latest Update - Tue, 14 Apr 2026 16:33:30 UTC

Update - Tue, 14 Apr 2026 14:15:45 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Tue, 14 Apr 2026 15:13:50 UTC

While we have implemented initial mitigation steps, including a node restart, currently verifying the performance. We are continuing to investigate the issue to restore full service stability.

Update - Tue, 14 Apr 2026 15:27:46 UTC

The Zscaler teams have successfully mitigated the issue, supported by positive feedback from customers. Zscaler continues to monitor the situation closely to ensure ongoing stability and to promptly address any potential reoccurrences or new issues that may arise.

Update - Tue, 14 Apr 2026 16:33:30 UTC

Brussels (BRU2) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Mon, 13 Apr 2026 21:45:00 GMT

Zscaler will be performing hardware maintenance in the Brussels II (BRU2) Datacenter.

Maintenance window,
Start: 2026-04-17 21:00 CEST
End: 2026-04-17 23:00 CEST
(i.e. 2026-04-17 19:00 - 21:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

Update - Fri, 17 Apr 2026 20:02:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net

Mon, 13 Apr 2026 21:22:18 GMT

Zscaler has detected an issue with Reporting and Logging on its zdxcloud.net Cloud. Customers may experience a temporary delay in reporting data.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The incident was caused by a performance bottleneck within our backend systems that temporarily delayed data processing

Latest Update - Tue, 14 Apr 2026 00:51:43 UTC

Update - Mon, 13 Apr 2026 21:37:08 UTC

We have identified the root cause of the issue and working on resolution.

Update - Mon, 13 Apr 2026 22:40:02 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Tue, 14 Apr 2026 00:51:43 UTC

User Authentication Issues - zscalerthree.net

Sun, 12 Apr 2026 23:31:23 GMT

Zscaler has detected an user authentication issue on its zscalerthree.net Cloud. Customer might experience issues with user authentication services, impacting Zscaler Client Connector (ZCC) login, web traffic authentication and Zscaler Client Connector portal.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Issue occurred due to service certificate issue.

Latest Update - Mon, 13 Apr 2026 07:08:34 UTC

Zscaler monitored the issue for a period of time and confirmed—based on internal checks and ongoing monitoring—that all systems are operating normally and the issue is resolved.

Update - Sun, 12 Apr 2026 23:32:52 UTC

We have identified the root cause of the issue and working on resolution.

Update - Mon, 13 Apr 2026 00:42:27 UTC

The Zscaler team has identified the issue as being related to service certificate issue. Zscaler teams are actively working to rolling back to a known stable configuration.

Update - Mon, 13 Apr 2026 01:10:59 UTC

We are actively rolling back to a known stable configuration, and services are recovering. We will provide the next update as recovery progresses.

Update - Mon, 13 Apr 2026 02:17:50 UTC

Zscaler has reverted the change and restored the previously valid certificate to address reports of SSL certificate verification failures affecting customers on the ZS3 cloud. The issue is now mitigated, and we are monitoring to ensure stability.

Update - Mon, 13 Apr 2026 07:08:34 UTC

Zscaler monitored the issue for a period of time and confirmed—based on internal checks and ongoing monitoring—that all systems are operating normally and the issue is resolved.

Administration UI and User Authentication Issues - zscalerthree.net

Sat, 11 Apr 2026 02:35:39 GMT

Zscaler has detected an issue with its zscalerthree.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The preliminary root cause of this issue is attributed to a fault in the control plane.

Update - Sat, 11 Apr 2026 02:37:12 UTC

Zscaler observed an issue affecting the control plane. The service recovered automatically via built-in self-healing mechanisms. The issue is now resolved, and we are actively monitoring the cloud to ensure continued stability.

Munich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net

Fri, 10 Apr 2026 23:51:56 GMT

Zscaler will be enabling IPv6 at our Munich I (MUC1) Data Center. During the maintenance window the services through MUC1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 14, 1:30 pm PDT (April 14, 20:30 UTC)

End time is April 14, 6:00 pm PDT (April 15, 1:00 UTC)

Update - Wed, 15 Apr 2026 00:58:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - EMEA Region - zscaler.net

Fri, 10 Apr 2026 22:58:38 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region data centers on zscaler.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Update - Sat, 11 Apr 2026 01:02:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Fri, 10 Apr 2026 21:16:49 GMT

Zscaler will be enabling IPv6 at our Atlanta II (ATL2) Data Center. During the maintenance window the services through ATL2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 16, 6:00 pm PDT (April 17, 1:00 UTC)

End time is April 17, 12:00 am PDT (April 17, 10:00 UTC)

Update 4/17: Extending Maintenance

Update - Fri, 17 Apr 2026 08:40:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Auckland II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Fri, 10 Apr 2026 21:11:29 GMT

Zscaler will be enabling IPv6 at our Auckland II (AKL2) Data Center. During the maintenance window the services through AKL2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 16, 6:00 am PDT (April 16, 13:00 UTC)

End time is April 16, 11:00 am PDT (April 16, 18:00 UTC)

Update - Thu, 16 Apr 2026 18:01:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Boston I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net

Fri, 10 Apr 2026 21:08:41 GMT

Zscaler will be enabling IPv6 at our Boston I (BOS1) Data Center. During the maintenance window the services through BOS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 15, 6:00 pm PDT (April 16, 13:00 UTC)

End time is April 15, 11:00 pm PDT (April 16, 18:00 UTC)

Update - Thu, 16 Apr 2026 02:49:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Amsterdam III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 10 Apr 2026 21:05:47 GMT

Zscaler will be enabling IPv6 at our Amsterdam III (AMS3) Data Center. During the maintenance window the services through AMS3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 15, 1:30 pm PDT (April 15, 20:30 UTC)

End time is April 15, 6:30 pm PDT (April 16, 1:30 UTC)

Update - Thu, 16 Apr 2026 00:11:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net

Fri, 10 Apr 2026 20:58:26 GMT

Zscaler will be enabling IPv6 at our Tokyo IV (TYO4) Data Center. During the maintenance window the services through TYO4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 14, 9:00 pm PDT (April 14, 16:00 UTC)

End time is April 14, 2:00 pm PDT (April 14, 21:00 UTC)

Update 4/14: Maintenance postponed

Denver III (DEN3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 10 Apr 2026 07:44:02 GMT

Zscaler will be performing hardware maintenance in Denver III (DEN3) Datacenter .

Maintenance window:
Start: 2026-04-13 05:00 UTC
End: 2026-04-13 08:00 UTC
(Local Time 2026-04-12 23:00 - 2026-04-13 02:00)

Update - Mon, 13 Apr 2026 06:03:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - EMEA Region - zscloud.net

Thu, 09 Apr 2026 23:06:57 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscloud.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Update - Fri, 10 Apr 2026 01:49:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Plus Beijing V and Shanghai VI Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 09 Apr 2026 18:50:54 GMT

Beijing V and Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.

Start Time: 2026-06-05 16:00:00 UTC
End Time: 2026-06-05 20:00:00 UTC
(Datacenter Local Time 2026-06-06 00:00 - 2026-06-06 04:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Urgent Maintenance - zscalerone.net

Thu, 09 Apr 2026 19:17:31 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 01:00 AM Pacific Time on April 10, 2026 (Friday, April 10, 2026 08:00 AM UTC), and can take up to 4 hours to complete.

Update - Fri, 10 Apr 2026 10:26:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zdxcloud.net

Thu, 09 Apr 2026 18:26:22 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Thursday at 03:00 PM Pacific Time on April 9, 2026 (Thursday, April 9, 2026 10:00 PM UTC), and can take up to 2 hours to complete.

During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Update - Thu, 09 Apr 2026 23:29:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago I (CHI1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Thu, 09 Apr 2026 15:07:26 GMT

Zscaler will be performing hardware maintenance in the Chicago I (CHI1) Datacenter.

Maintenance window,
Start: 2026-4-13 03:00 CDT
End: 2026-4-13 05:00 CDT
(i.e. 2026-4-13 08:00 - 10:00 UTC)

No service impact is expected during this maintenance.

Update - Mon, 13 Apr 2026 08:16:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zscalerthree.net

Thu, 09 Apr 2026 01:01:00 GMT

Zscaler is updating the maintenance window schedule for Oceania, APAC and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.

Time (in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
Oceania		9:00 AM – 11:00 AM	9:00 AM – 11:00 AM	9:00 AM – 12:00 PM		9:00 AM – 12:00 PM
Asia Pacific	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	4:00 PM – 7:00 PM		1:00 PM - 4:00 PM	3:00 PM – 6:00 PM
EMEA	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 11:00 PM
AMER		6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	4:00 AM - 7:00 AM		9:00 AM – 12:00 PM
All Regions		1:00 AM – 3:00 AM	1:00 AM – 3:00 AM	1:00 AM – 3:00 AM			1:00 AM – 6:00 AM

Maintenance Window Updates - zscloud.net

Thu, 09 Apr 2026 00:54:16 GMT

Zscaler is updating the maintenance window schedule for Oceania, APAC and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.

Time(in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
Oceania		9:00 AM – 11:00 AM	9:00 AM – 11:00 AM	9:00 AM – 12:00 PM		9:00 AM – 12:00 PM
Asia Pacific	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	4:00 PM – 7:00 PM		1:00 PM - 4:00 PM	3:00 PM – 6:00 PM
EMEA	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 11:00 PM
AMER		6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	3:00 AM - 6:00 AM		9:00 AM – 12:00 PM
All Regions		1:00 AM – 3:00 AM	1:00 AM – 3:00 AM	1:00 AM – 3:00 AM			1:00 AM – 6:00 AM

Maintenance Window Updates - zscalertwo.net

Thu, 09 Apr 2026 00:23:43 GMT

Zscaler is updating the maintenance window schedule for Oceania, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.

Time (in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
Oceania		9:00 AM – 11:00 AM	9:00 AM – 11:00 AM		9:00 AM – 12:00 PM	9:00 AM – 12:00 PM
Asia Pacific	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM		4:00 PM – 7:00 PM	1:00 PM -4:00 PM
EMEA	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM		8:00 PM – 11:00 PM		1:00 AM– 4:00 AM
AMER		6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	6:00 AM – 8:00 AM			9:00 AM – 12:00 PM
All Regions		1:00 AM – 3:00 AM	1:00 AM – 3:00 AM	1:00 AM – 3:00 AM		1:00 AM – 6:00 AM

Maintenance Window Updates - zscaler.net

Wed, 08 Apr 2026 23:37:25 GMT

Zscaler is updating the maintenance window schedule for Oceania, APAC, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.

Time (in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
Oceania		9:00 AM – 11:00 AM	9:00 AM – 11:00 AM		9:00 AM – 12:00 PM	9:00 AM– 12:00 PM	9:00 AM– 12:00 PM
Asia Pacific	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM		4:00 PM – 7:00 PM	1:00 PM– 4:00 PM
EMEA	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM	8:00 PM – 10:00 PM		8:00 PM – 11:00 PM		1:00 AM– 4:00 AM
AMER		6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	6:00 AM – 8:00 AM			9:00 AM – 12:00 PM
All Regions		1:00 AM – 3:00 AM	1:00 AM – 3:00 AM	1:00 AM – 3:00 AM		1:00 AM– 6:00 AM

Maintenance Window Updates - zscalerone.net

Wed, 08 Apr 2026 22:46:17 GMT

Zscaler is updating the maintenance window schedule for Oceania, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.

Time(in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
Oceania		9:00 AM – 11:00 AM	9:00 AM – 11:00 AM		9:00 AM – 12:00 PM	9:00 AM – 12:00 PM
EMEA							1:00 AM– 4:00 AM
AMER		6:00 AM – 8:00 AM	6:00 AM – 8:00 AM	6:00 AM – 8:00 AM			9:00 AM – 12:00 PM
All Regions		1:00 AM – 3:00 AM	1:00 AM – 3:00 AM	1:00 AM – 3:00 AM	11:00 PM – 3:00 AM
	1:00 PM– 4:00 PM

Delay in Processing Inbound Emails to Support Cases - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Wed, 08 Apr 2026 00:00:00 GMT

Zscaler is aware of an issue impacting delay in processing inbound emails to support cases.

Zscaler services are operating normally; delays are currently impacting the synchronization of inbound email communications related to support cases. This is due to a dependency issue with our service provider that is affecting email processing, leading to slower updates. Zscaler is actively coordinating with the service provider to restore normal functionality.

Impact: During this time, customers may experience delays in email updates, including slower responses or delayed synchronization of messages within existing or new support cases.

Workaround: Customers needing urgent assistance should contact Zscaler Support by phone or update their case directly through the Customer Support Portal.

Zscaler will continue to provide updates as more information becomes available and service is restored.

Update - Wed, 08 Apr 2026 22:51:51 UTC

Zscaler has received confirmation that the issue has been addressed and a fix has been implemented by the service provider. Emails that were temporarily delayed have been automatically retried and are now being processed. The service provider is continuing to monitor stability, and Zscaler is actively monitoring the environment to ensure sustained recovery.

Scheduled Maintenance - zscaler.net

Wed, 08 Apr 2026 18:19:14 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscaler.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on April 11, 2026 (Saturday, April 11, 2026 01:00 PM UTC), and can take up to 4 hours to complete.

Update - Sat, 11 Apr 2026 17:05:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

IdP-initiated Authentication Issue - zscaler.net, zscloud.net

Wed, 08 Apr 2026 09:38:17 GMT

Zscaler is currently investigating reports of issues with its zscaler.net, zscloud.net Cloud. Customers using IdP-initiated authentication may experience login failures.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue occurred due to a recently enabled feature change.

Latest Update - Thu, 09 Apr 2026 12:51:26 UTC

Update - Wed, 08 Apr 2026 10:18:06 UTC

The Zscaler team has identified the issue: previous mitigation efforts did not propagate to a subset of Service Edges. Our teams are actively prioritizing this incident, have identified the fix, and are working to restore services.

Update - Wed, 08 Apr 2026 11:44:42 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 08 Apr 2026 15:21:17 UTC

The issue remains stable and the mitigation continues to hold. We will continue monitoring until 12:00 UTC tomorrow; if stability persists, we will then resolve the incident.

Update - Thu, 09 Apr 2026 12:51:26 UTC

Kolkata I (CCU1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Wed, 08 Apr 2026 07:24:37 GMT

Zscaler will be performing hardware maintenance in Kolkata I (CCU1) Datacenter.

Maintenance window:
Start: 2026-04-14 14:30 UTC
End: 2026-04-14 17:30 UTC
(Local Time 2026-04-14 20:00 - 2026-04-14 23:00 IST)

Update - Tue, 14 Apr 2026 15:15:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London V Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net

Tue, 07 Apr 2026 20:56:21 GMT

Zscaler will be enabling IPv6 at our London V (LON5) Data Center. During the maintenance window the services through LON5 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 17, 2:00 pm PDT (April 17, 21:00 UTC)

End time is April 17, 6:00 pm PDT (April 18, 1:00 UTC)

Update 4/8: Maintenance Window Updated
Update 4/10: Maintenance rescheduled

Update - Fri, 17 Apr 2026 23:57:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

IdP-initiated Authentication Issue - zscaler.net, zscloud.net

Tue, 07 Apr 2026 15:18:53 GMT

Root Cause - The issue occurred due to a recently enabled feature change.

Latest Update - Tue, 07 Apr 2026 20:43:29 UTC

Update - Tue, 07 Apr 2026 15:20:48 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Tue, 07 Apr 2026 20:43:29 UTC

Munich I Datacenter Scheduled Maintenance – IPv6 Enablement - zscloud.net

Mon, 06 Apr 2026 19:24:51 GMT

Zscaler will perform scheduled maintenance at our Munich I (MUC1) Data Center to complete preparatory work for future IPv6 enablement. During the maintenance window, services through the MUC1 Data Center may be restarted in phases to minimize impact.

Other Zscaler sites and services will continue to operate normally.

Maintenance Window:

Start time is April 7, 1:00 pm PDT (April 7, 20:00 UTC)

End time is April 7, 6:00 pm PDT (April 8, 1:00 UTC)

Update - Tue, 07 Apr 2026 23:41:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Plus Beijing V and Shanghai VI Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 06 Apr 2026 16:46:29 GMT

Start Time: 2026-04-12 12:00:00 UTC
End Time: 2026-04-12 14:00:00 UTC
(Datacenter Local Time 2026-04-12 20:00 - 2026-04-12 22:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Sun, 12 Apr 2026 14:01:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta III (ATL3) Datacenter Network Maintenance - zscaler.net

Mon, 06 Apr 2026 16:13:19 GMT

Zscaler will be performing hardware maintenance in the Atlanta III (ATL3) Datacenter.

Maintenance window,
Start: 2026-4-7 18:00 EST
End: 2026-4-7 20:00 EST
(i.e. 2026-4-7 22:00 - 2026-4-8 00:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Urgent Maintenance on zdxcloud.net - zdxcloud.net

Sun, 05 Apr 2026 06:04:25 GMT

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Sunday at 06:15 AM UTC on April 05, 2026, and can take up to 1 hour to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Update - Sun, 05 Apr 2026 06:33:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net

Sun, 05 Apr 2026 05:00:12 GMT

Zscaler has detected an issue with the ZDX cloud. Customers may experience a temporary delay in reporting data.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Issue occurred due to a recent service update.

Latest Update - Fri, 10 Apr 2026 12:26:28 UTC

Update - Sun, 05 Apr 2026 06:39:23 UTC

Zscaler has identified the cause of the issue and implemented mitigation actions. Service has been restored and we continue to closely monitor the environment to ensure stability.

Update - Sun, 05 Apr 2026 18:24:07 UTC

No further issues were observed during the monitoring period. We continue to work toward a permanent resolution.

Update - Mon, 06 Apr 2026 03:31:53 UTC

No issues have been observed during the monitoring period. We have applied mitigations as needed and continue to monitor service health. We are actively working on a permanent resolution to prevent recurrence.

Update - Fri, 10 Apr 2026 12:26:28 UTC

ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net

Sat, 04 Apr 2026 17:57:22 GMT

Zscaler has detected an issue impacting connectivity between client connector and ZDX cloud. Customers may experience a temporary delay in reporting data.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: A service component within the ZDX cloud was unable to process user authentication information correctly following a recent maintenance activity, resulting in degradation of reporting and data visibility in the ZDX Admin Portal.

Latest Update - Sat, 04 Apr 2026 19:52:00 UTC

Zscaler has confirmed that the issue has been fully resolved, and services have been restored to normal operation. Reporting and data availability within the ZDX Admin Portal are fully functional. Zscaler will continue to monitor the environment to ensure sustained stability.

Update - Sat, 04 Apr 2026 18:24:26 UTC

Zscaler has identified the cause of the issue and implemented mitigation actions. Service restoration is in progress, and improvements are being observed in reporting and data availability within the ZDX Admin Portal. Zscaler continues to closely monitor the environment to ensure stability and full recovery of services.

Update - Sat, 04 Apr 2026 19:52:00 UTC

Private Service Edge (PSE) – Intermittent Traffic Blocking for Explicit Proxy Traffic - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sat, 04 Apr 2026 17:29:44 GMT

Zscaler is aware of and actively investigating an issue impacting a subset of customers using Private Service Edge (PSE). Some customers are experiencing intermittent traffic blocking when accessing websites through PSE. Affected requests may return the error: "Web Application Blocked by Firewall Rule."

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The root cause of this issue was related to a recently implemented change, which was reverted to restore the services.

Latest Update - Sun, 05 Apr 2026 07:14:32 UTC

Zscaler identified the issue and took necessary actions to resolve it across all clouds.

Update - Sat, 04 Apr 2026 18:32:37 UTC

Zscaler has identified the issue and is actively working on mitigation steps to restore expected traffic handling behavior within the data plane.

Update - Sun, 05 Apr 2026 07:14:32 UTC

Zscaler identified the issue and took necessary actions to resolve it across all clouds.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Sat, 04 Apr 2026 12:31:26 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Saturday at 05:45 AM Pacific Time on April 04, 2026 (Saturday, April 04, 2026 12:45 PM UTC), and can take up to 2 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 04 Apr 2026 13:52:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London V Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 03 Apr 2026 22:09:50 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our London V (LON5) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 9, 1:00 pm PDT (April 9, 20:00 UTC)

End time is April 9, 6:00 pm PDT (April 10, 1:00 UTC)

Update - Fri, 10 Apr 2026 00:55:23 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Montreal I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Fri, 03 Apr 2026 22:04:38 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Montreal I (YMQ1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 8, 6:00 pm PDT (April 9, 1:00 UTC)

End time is April 8, 11:00 pm PDT (April 9, 6:00 UTC)

Update - Thu, 09 Apr 2026 04:04:46 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Axios Supply Chain Attack Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Fri, 03 Apr 2026 00:00:00 GMT

Zscaler has analyzed the supply chain compromises affecting the Axios npm packages. Analysis confirms no impact to Zscaler platforms, products, or internal systems.

As a best practice, customers should review their environments for the following impacted versions:

Axios npm package versions: 1.14.1 and 0.30.4

Actions if you have an impacted version:

Update/Revert: Revert or pin Axios to known safe versions (e.g., 1.14.0 or 0.30.3)
Rotate Credentials: Update all API keys, cloud tokens, and environment variables associated with this library.

Zscaler will continue to monitor the situation and update this post if new information emerges.

User Authentication Issue on Kingdom of Saudi Arabia I datacenter - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 02 Apr 2026 11:18:31 GMT

Zscaler has detected an issue with its Kingdom of Saudi Arabia I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause - Third-party transit provider issue.

Latest Update - Thu, 02 Apr 2026 18:53:59 UTC

Update - Thu, 02 Apr 2026 11:47:44 UTC

Zscaler has implemented the necessary mitigation measures to address the issue impacting the KSA1 datacenter and services have stabilized. We will continue to closely monitor the environment to ensure sustained stability and will provide further updates if there are any changes.

Update - Thu, 02 Apr 2026 18:53:59 UTC

Planned Maintenance Activity for ZPA platform service - private.zscaler.com

Thu, 02 Apr 2026 07:50:41 GMT

We will be performing planned maintenance on our platform infrastructure in the Prod US region to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sun, 05 Apr 2026 03:06:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming New Data Centers and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Wed, 01 Apr 2026 23:02:42 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on April 1, 2026, we would like to notify you of the upcoming new data centers and expansions at the locations listed below. These would be available anytime on or after May 31, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Montreal I	198.14.104.0/23	Expansion of existing data center
Americas	Seattle	198.14.106.0/23	Expansion of existing data center
Americas	Vancouver I	137.31.24.0/23	Expansion of existing data center
Americas	Vancouver I	137.31.26.0/23	Expansion of existing data center
EMEA	Amsterdam Il	137.31.28.0/23	Expansion of existing data center
EMEA	Amsterdam Il	137.31.30.0/23	Expansion of existing data center
EMEA	Zurich	137.31.20.0/23	Expansion of existing data center
EMEA	Zurich	137.31.22.0/23	Expansion of existing data center
APAC	Jakarta I	122.10.149.0/24	New RS* data center

*RS - Regional Surcharge (An additional subscription is required to use these data centers)

We recommend that you add the IP address ranges listed in the ‘Zscaler Aggregate IP Address Ranges’ section of the CENR pages (refer applicable links below) to your access lists, firewalls, and application allow lists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Scheduled Maintenance - zscalerthree.net

Wed, 01 Apr 2026 18:13:17 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscalerthree.net cloud. This maintenance is scheduled for Saturday at 07:00 AM Pacific Time on April 4, 2026 (Saturday, April 4, 2026 02:00 PM UTC), and can take up to 4 hours to complete.

Update - Sat, 04 Apr 2026 17:54:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zurich I Datacenter Scheduled Maintenance - Service Expansion - zscloud.net

Wed, 01 Apr 2026 17:17:16 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Zurich I (ZRH1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 2, 1:30 pm PDT (April 2, 20:30 UTC)

End time is April 2, 4:30 pm PDT (April 2, 23:30 UTC)

Update - Thu, 02 Apr 2026 23:24:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai II, Hyderabad I, Mumbai VI, Mumbai VII, New Delhi I Datacenter Issue - zscalerthree.net

Wed, 01 Apr 2026 10:49:18 GMT

Zscaler has detected an issue with its Chennai II, Hyderabad I, Mumbai VI, Mumbai VII, New Delhi I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to a software defect introduced by a recent change.

Latest Update - Thu, 02 Apr 2026 06:02:40 UTC

Zscaler has continued monitoring the environment and confirmed all services are operating normally and as expected. The previously observed impact has cleared, This issue is now resolved.

Update - Wed, 01 Apr 2026 11:23:36 UTC

Zscaler has identified the root cause as a software defect introduced by a recent change, and we will be reverting the change during the change window between 8–10 PM UTC to restore normal service. We will provide the next update as soon as it is available.

Update - Wed, 01 Apr 2026 23:25:53 UTC

We have successfully reverted the change that caused the issue in the affected data centers. We are continuing to monitor the environment for stability.

Update - Thu, 02 Apr 2026 06:02:40 UTC

Zscaler has continued monitoring the environment and confirmed all services are operating normally and as expected. The previously observed impact has cleared, This issue is now resolved.

Montreal I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 01 Apr 2026 00:01:39 GMT

Zscaler will be enabling IPv6 at our Montreal I (YMQ1) Data Center. During the maintenance window the services through YMQ1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 1, 6:00 pm PDT (April 2, 1:00 UTC)

End time is April 1, 11:00 pm PDT (April 2, 6:00 UTC)

Update - Thu, 02 Apr 2026 04:19:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Action Required — Verify/Correct Your Z-Identity IdP “Primary Email” Attribute Mapping - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Tue, 31 Mar 2026 00:00:00 GMT

Zscaler is proactively reaching out to help prevent potential login failures to the Z-Identity Admin Console when authenticating through your Identity Provider (IdP). Based on monitoring, your tenant may be missing or mis-mapping the required Primary Email attribute used during JIT (Just-In-Time) provisioning.

This advisory relates to the recent incident and follow-up corrective actions (Reference: Trust Post: Z-Identity Portal Issue).

What is the issue?

On Mar 21st, some customers experienced login failures to the Z-Identity Admin Console when authenticating via their IdP. The error observed was:

“Invalid Input Error: Primary Email is required.”

Why this is needed

Zscaler deployed an update to improve validation of attributes during JIT provisioning. A subset of customers encountered login failures where the IdP was not sending the required email attribute or it was incorrectly mapped. To restore stability, Zscaler reverted the change.

Zscaler is now running a monitoring-only period and asking customers to validate/correct mappings before the improved validation is re-enabled in a controlled manner.

Who is impacted?

You may be impacted if all of the following apply:

IdP-based authentication is enabled (SSO via Google Workspace, Azure AD, Okta, etc.)
JIT provisioning is enabled
The Primary Email attribute mapping is missing or incorrect (wrong attribute name or not present in the IDP assertion)

Why JIT matters: JIT synchronizes user attributes from the IdP to Z-Identity at login; missing/incorrect Primary Email mapping is most likely to cause failures when validation is re-enabled.

Action Required — Verify your IdP “Primary Email” attribute mapping

Quick verification steps

Confirm IDP assertion includes an email address
- In your IdP admin console, open the Zscaler Z-Identity IDP app configuration.
- Use Test / Preview IDP Response.
- Verify an email attribute is present and contains the user’s email address.
Confirm attribute/claim mapping matches the assertion
- Review your IdP attribute/claim mappings.
- Ensure the mapped attribute name matches the actual attribute name in the assertion.
Recommended: Test with JIT provisioning
- Create a new test user in the IdP that does not exist in Z-Identity.
- Attempt login to the Z-Identity Admin Console via IdP.
- Expected results:
  - If the user is created successfully → mapping is correct.
  - If you see “Primary Email is required” → mapping needs correction.

If your test fails (remediation)

Update the IdP mapping to use the correct email attribute name
Ensure the email attribute is included in the IDP assertion
Re-test using a new JIT user
Notify your TSM/Zscaler Support once corrected

Timeline / next steps

Zscaler plans to re-enable the updated validation in approximately three weeks. Customers are requested to remediate before April 15th to ensure adequate time for correction and testing.

Support / escalation

If you need help validating the IDP assertion or correcting the mapping, contact Zscaler Support and include:

Your IdP vendor/type
Screenshot/description of your email attribute/claim mapping
(If available) the attribute name used for email in the IDP assertion (no sensitive data required)

Administration UI and User Authentication Issues - zscalertwo.net

Tue, 31 Mar 2026 05:00:42 GMT

Zscaler has detected an issue with the administration UI and user authentication on its zscalertwo.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The preliminary root cause of this issue is attributed to a fault in the control plane.

Latest Update - Tue, 31 Mar 2026 06:31:18 UTC

Following continued monitoring of the control plane, Zscaler now considers the issue resolved.

Update - Tue, 31 Mar 2026 05:17:49 UTC

Update - Tue, 31 Mar 2026 06:31:18 UTC

Following continued monitoring of the control plane, Zscaler now considers the issue resolved.

Urgent Maintenance on Mumbai VI and New Delhi I datacenters - zscalerthree.net

Mon, 30 Mar 2026 23:15:07 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Mumbai VI and New Delhi I datacenters on the zscalerthree.net cloud. This maintenance is scheduled for Monday at 4:30 PM Pacific Time on March 30, 2026 (Monday, March 30, 2026 11:30 PM UTC), and can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 31 Mar 2026 00:18:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zurich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 30 Mar 2026 21:59:16 GMT

Zscaler will be enabling IPv6 at our Zurich I (ZRH1) Data Center. During the maintenance window the services through ZRH1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 9, 1:30 pm PDT (April 9, 20:30 UTC)

End time is April 9, 7:00 pm PDT (April 10, 2:00 UTC)

Update 3/31: Maintenance postponed
Update 4/7: Maintenance rescheduled
Update 4/8: Maintenance window updated

Update - Fri, 10 Apr 2026 01:54:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Customer Support Portal (CSP) Login Issues - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Mon, 30 Mar 2026 21:09:03 GMT

Zscaler is currently investigating an issue impacting Customer Support Portal (CSP) access for a subset of customers. Affected customers may encounter the error message: “Can’t connect to Zscaler Support” when attempting to log in to the CSP.

Workaround: While a fix is being implemented, customers may use the following alternative methods:

If you have Administrative access to another Zscaler product (such as ZIA, ZPA, or ZDX), you can access the Support Portal through that product’s Admin interface and manage or create support cases as needed.
Customers without access to an alternative product Admin portal are advised to contact Zscaler Support via phone for assistance.

Zscaler is actively working to resolve the issue and restore normal access. Further updates will be provided as progress is made.

Latest Update - Tue, 07 Apr 2026 21:17:48 UTC

Update - Thu, 02 Apr 2026 22:02:24 UTC

Zscaler has completed remediation for the majority of impacted customers, and access to the Customer Support Portal (CSP) has been restored. We are performing final validation checks to ensure consistent access across all customers. Further updates will be provided as needed.

Update - Tue, 07 Apr 2026 21:17:48 UTC

São Paulo IV (SAO4) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net

Mon, 30 Mar 2026 19:33:18 GMT

Zscaler will be performing critical hardware maintenance in the São Paulo IV (SAO4) Datacenter.

Maintenance window,
Start: 2026-4-2 18:00 GMT-3
End: 2026-4-2 22:00 GMT-3
(i.e. 2026-4-2 21:00 - 2026-4-3 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 02 Apr 2026 23:36:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification For New Data Center and Old CIDR Deprecation - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 30 Mar 2026 18:59:14 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on February 10, 2026, we would like to remind you of the upcoming new data center at the location listed below. This would be available anytime on or after April 11, 2026.

Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Mexico City II	205.220.94.0/23	New data center
Americas	Mexico City II	205.220.100.0/23	New data center
Americas	Mexico City II	205.220.104.0/23	New data center
Americas	Mexico City II	205.220.106.0/23	New data center
Americas	Mexico City II	205.220.108.0/23	New data center
Americas	Mexico City II	205.220.110.0/23	New data center
Americas	Mexico City II	205.220.112.0/23	New data center
Americas	Mexico City II	205.220.114.0/23	New data center
Americas	Mexico City II	205.220.116.0/23	New data center
Americas	Mexico City II	2605:4300:3a00::/40	New data center
All	All	199.168.148.0/22*	Deprecated

*Applicable only to private.zscaler.com cloud

You can safely remove the reference to the deprecated IP address range because these addresses are no longer in use.

We recommend that you add the IP address ranges listed in the ‘Zscaler Aggregate IP Address Ranges’’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

ZIA Platform Alerts – Email Notifications Not Being Delivered - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 27 Mar 2026 21:30:58 GMT

Zscaler is investigating an issue impacting email notifications for Platform Alerts configured within the ZIA Admin Portal (Under Administration > Define Alerts Page > Alerts). Customers may not be receiving email notifications for alert-triggering events.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to resource contention on core notification.

Latest Update - Thu, 02 Apr 2026 09:32:00 UTC

Zscaler has implemented the fix to restore normal email notification delivery for configured ZIA Platform Alerts. Services are now working as expected; therefore, we are marking this incident as Resolved.

Update - Sat, 28 Mar 2026 01:01:30 UTC

Zscaler continues to investigate the root cause of the issue and is actively working on a fix to restore normal email notification delivery. Further updates will be provided as progress is made.

Update - Thu, 02 Apr 2026 07:43:22 UTC

Zscaler is in the final phase of implementing a fix to restore normal email notification delivery. Checks and validation are in progress, and we will provide an update shortly once the fix is deployed.

Update - Thu, 02 Apr 2026 09:32:00 UTC

Planned Maintenance Activity for ZPA authentication service - private.zscaler.com

Fri, 27 Mar 2026 14:29:39 GMT

We will be performing planned maintenance on our ZPA authentication platform infrastructure to enhance availability and resiliency. Customers may witness authentication issue while login to Admin UI or Public API during this maintenance window.

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sat, 28 Mar 2026 03:34:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalertwo.net

Fri, 27 Mar 2026 05:20:39 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalertwo.net cloud. This maintenance is scheduled for Thursday at 10:30 PM Pacific Time on March 26, 2026 (Friday, March 27, 2026 05:30 AM UTC), and can take up to 30 minutes to complete.

During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

Update - Fri, 27 Mar 2026 06:29:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Experience Center – SSO Error When Accessing Support Tab - zslogin.net

Fri, 27 Mar 2026 00:00:00 GMT

Zscaler is investigating an issue impacting Experience Center customers, where users may encounter an SSO error when navigating to the Support tab within the Experience Portal.

Impact: Customers attempting to access the Support tab through the Experience Center portal may be unable to successfully authenticate via SSO. All other platform functionalities remain unaffected.

Workaround:
Customers can continue to access the Support Portal using the following validated workaround:

Log in to an alternate Zscaler Product Admin Portal (e.g., ZIA, ZPA, or ZDX)
Navigate to the Support Portal from that product interface
From there:
- View existing cases across all products, including Experience Center, or
- Create a new case and manually select:
  - Product: Experience Center
  - Company ID: Corresponding Experience Center tenant

Zscaler has identified the underlying cause of the issue and a fix has been developed. Deployment of the fix is currently planned for March 28, 2026, during the Maintenance Window.

Update - Sat, 28 Mar 2026 09:59:05 UTC

Zscaler has deployed a fix, and the issue impacting access to the Support tab in the Experience Center portal has been resolved. Services have been restored, and customers should now be able to access Support functionality normally. Zscaler will continue to monitor the environment to ensure ongoing stability.

China Premium Access Plus Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 26 Mar 2026 22:07:47 GMT

Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.

Start Time: 2026-04-08 14:00:00 UTC
End Time: 2026-04-08 15:00:00 UTC
(Datacenter Local Time 2026-04-08 22:00 - 2026-04-08 23:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Wed, 08 Apr 2026 15:16:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming Extranet Virtual IP Address Announcement - zscloud.net

Thu, 26 Mar 2026 21:57:07 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on March 26, 2026, we would like to notify you of the new Virtual IP addresses (VIPs) for the Zscaler Extranet Application Support rollout.

These new Extranet VIPs can be used to terminate IPSec VPN tunnels with Extranet connectivity at the locations listed below. The VIPs will be displayed on the Zscaler Config page for ease of access and visibility. Users who do not wish to use Zscaler Extranet Application Support will not be impacted by this change.

Region	Location	Extranet VIP Addresses	Status
Americas	Chicago II (CHI2)	170.85.14.198	Future Use
Americas	Chicago II (CHI2)	2605:4300:2a10::3b	Future Use
Americas	Los Angeles II (QLA2)	170.85.230.198	Future Use
Americas	Los Angeles II (QLA2)	2605:4300:3710::3b	Future Use
Americas	Montreal I (YMQ1)	165.225.212.65	Future Use
Americas	Montreal I (YMQ1)	2605:4300:2711::43	Future Use
Americas	Santiago II (SCL2)	205.220.0.198	Live
Americas	Santiago II (SCL2)	2605:4300:e410::36	Future Use
Americas	São Paulo IV (SAO4)	147.161.128.59	Live
Americas	São Paulo IV (SAO4)	2605:4300:e311::43	Future Use
Americas	Washington IV (WAS4)	170.85.86.198	Future Use
Americas	Washington IV (WAS4)	2605:4300:2d10::27	Future Use
APAC	Chennai III (MAA3)	167.103.70.198	Future Use
APAC	Chennai III (MAA3)	2400:7aa0:2410::f	Future Use
APAC	Kolkata I (CCU1)	205.220.16.198	Live
APAC	Kolkata I (CCU1)	2400:7aa0:2910::36	Future Use
APAC	Kuala Lumpur II (KUL2)	205.220.70.198	Live
APAC	Kuala Lumpur II (KUL2)	2400:7aa0:2b10::36	Future Use
APAC	Mumbai VII (BOM7)	167.103.132.198	Future Use
APAC	Mumbai VII (BOM7)	2400:7aa0:2610::f	Future Use
APAC	Singapore V (SIN5)	167.103.60.198	Live
APAC	Singapore V (SIN5)	2400:7aa0:2310::3b	Future Use
APAC	Sydney V (SYD5)	101.2.224.198	Live
APAC	Sydney V (SYD5)	2400:7aa0:2c10::27	Future Use
EMEA	Amsterdam III (AMS3)	87.58.118.198	Future Use
EMEA	Amsterdam III (AMS3)	2a03:eec0:3410::3b	Future Use
EMEA	Madrid IV (MAD4)	2a03:eec0:3110::3b	Future Use
EMEA	Manchester II (MAN2)	194.9.106.198	Future Use
EMEA	Manchester II (MAN2)	2a03:eec0:2e10::3b	Future Use
EMEA	Tel Aviv II (TLV2)	87.58.78.198	Future Use
EMEA	Tel Aviv II (TLV2)	2a03:eec0:3010::3b	Future Use

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Upcoming Extranet Virtual IP Address Announcement - zscalerthree.net

Thu, 26 Mar 2026 21:50:49 GMT

Dear Zscaler Customer,

Region	Location	Extranet VIP Addresses	Status
Americas	Chicago I (CHI1)	165.225.56.39	Future Use
Americas	Chicago I (CHI1)	165.225.60.35	Future Use
Americas	Chicago I (CHI1)	2605:4300:1314::71	Future Use
Americas	Chicago II (CHI2)	170.85.14.134	Future Use
Americas	Chicago II (CHI2)	2605:4300:2a10::3a	Future Use
Americas	Los Angeles II (QLA2)	170.85.230.134	Future Use
Americas	Los Angeles II (QLA2)	2605:4300:3710::3a	Future Use
Americas	Montreal I (YMQ1)	165.225.212.64	Future Use
Americas	Montreal I (YMQ1)	2605:4300:2711::42	Future Use
Americas	Santiago II (SCL2)	205.220.0.134	Live
Americas	Santiago II (SCL2)	2605:4300:e410::2b	Future Use
Americas	São Paulo IV (SAO4)	147.161.128.58	Future Use
Americas	São Paulo IV (SAO4)	2605:4300:e311::42	Future Use
Americas	Washington IV (WAS4)	170.85.86.134	Future Use
Americas	Washington IV (WAS4)	2605:4300:2d10::21	Future Use
APAC	Chennai III (MAA3)	167.103.70.134	Future Use
APAC	Chennai III (MAA3)	2400:7aa0:2410::e	Future Use
APAC	Chennai III (MAA3)	2400:7aa0:2411::36	Future Use
APAC	Kolkata I (CCU1)	205.220.16.134	Live
APAC	Kolkata I (CCU1)	2400:7aa0:2910::2b	Future Use
APAC	Kuala Lumpur II (KUL2)	205.220.70.134	Live
APAC	Kuala Lumpur II (KUL2)	2400:7aa0:2b10::2b	Future Use
APAC	Mumbai VI (BOM6)	167.103.186.34	Live
APAC	Mumbai VI (BOM6)	2400:7aa0:1319::32	Future Use
APAC	Mumbai VII (BOM7)	167.103.132.134	Future Use
APAC	Mumbai VII (BOM7)	2400:7aa0:2610::e	Future Use
APAC	Singapore V (SIN5)	167.103.60.134	Live
APAC	Singapore V (SIN5)	2400:7aa0:2310::3a	Future Use
APAC	Sydney V (SYD5)	101.2.224.134	Live
APAC	Sydney V (SYD5)	2400:7aa0:2c10::21	Future Use
APAC	Tokyo IV (TYO4)	101.2.202.37	Live
APAC	Tokyo IV (TYO4)	2400:7aa0:1e1a::20	Future Use
EMEA	Amsterdam III (AMS3)	87.58.118.134	Future Use
EMEA	Amsterdam III (AMS3)	2a03:eec0:3410::3a	Future Use
EMEA	Manchester II (MAN2)	194.9.106.134	Future Use
EMEA	Manchester II (MAN2)	2a03:eec0:2e10::3a	Future Use
EMEA	Tel Aviv II (TLV2)	87.58.78.134	Future Use
EMEA	Tel Aviv II (TLV2)	2a03:eec0:3010::3a	Future Use

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Upcoming Extranet Virtual IP Address Announcement - zscalertwo.net

Thu, 26 Mar 2026 21:46:00 GMT

Dear Zscaler Customer,

Region	Location	Extranet VIP Addresses	Status
Americas	Chicago I (CHI1)	165.225.56.38	Future Use
Americas	Chicago I (CHI1)	165.225.60.34	Future Use
Americas	Chicago I (CHI1)	2605:4300:1313::74	Future Use
Americas	Chicago I (CHI1)	2605:4300:1314::70	Future Use
Americas	Chicago II (CHI2)	170.85.14.70	Future Use
Americas	Chicago II (CHI2)	170.85.15.75	Future Use
Americas	Chicago II (CHI2)	2605:4300:2a10::39	Future Use
Americas	Chicago II (CHI2)	2605:4300:2a10::46	Future Use
Americas	Los Angeles II (QLA2)	170.85.230.70	Future Use
Americas	Los Angeles II (QLA2)	2605:4300:3710::39	Future Use
Americas	Montreal I (YMQ1)	2605:4300:2711::41	Future Use
Americas	Santiago II (SCL2)	205.220.0.70	Live
Americas	Santiago II (SCL2)	2605:4300:e410::20	Future Use
Americas	São Paulo IV (SAO4)	147.161.128.57	Live
Americas	São Paulo IV (SAO4)	2605:4300:e311::41	Future Use
Americas	Washington IV (WAS4)	170.85.86.70	Future Use
Americas	Washington IV (WAS4)	2605:4300:2d10::1b	Future Use
APAC	Chennai III (MAA3)	167.103.70.70	Future Use
APAC	Chennai III (MAA3)	2400:7aa0:2410::d	Future Use
APAC	Kolkata I (CCU1)	205.220.16.70	Live
APAC	Kolkata I (CCU1)	2400:7aa0:2910::20	Future Use
APAC	Kuala Lumpur II (KUL2)	205.220.70.70	Live
APAC	Kuala Lumpur II (KUL2)	2400:7aa0:2b10::20	Future Use
APAC	Mumbai VII (BOM7)	167.103.132.70	Future Use
APAC	Mumbai VII (BOM7)	2400:7aa0:2610::d	Future Use
APAC	Singapore V (SIN5)	167.103.60.70	Live
APAC	Singapore V (SIN5)	2400:7aa0:2310::39	Future Use
APAC	Sydney V (SYD5)	101.2.224.70	Live
APAC	Sydney V (SYD5)	2400:7aa0:2c10::1b	Future Use
EMEA	Amsterdam III (AMS3)	87.58.118.70	Future Use
EMEA	Amsterdam III (AMS3)	2a03:eec0:3410::39	Future Use
EMEA	Madrid IV (MAD4)	2a03:eec0:3110::39	Future Use
EMEA	Manchester II (MAN2)	194.9.106.70	Future Use
EMEA	Manchester II (MAN2)	2a03:eec0:2e10::39	Future Use
EMEA	Tel Aviv II (TLV2)	87.58.78.70	Future Use
EMEA	Tel Aviv II (TLV2)	2a03:eec0:3010::39	Future Use

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Upcoming Extranet Virtual IP Address Announcement - zscaler.net

Thu, 26 Mar 2026 21:41:32 GMT

Dear Zscaler Customer,

These new Extranet VIPs addresses can be used to terminate IPSec VPN tunnels with Extranet connectivity at the locations listed below. The VIPs will be displayed on the Zscaler Config page for ease of access and visibility. Users who do not wish to use Zscaler Extranet Application Support will not be impacted by this change.

Region	Location	Extranet VIP Addresses	Status
Americas	Chicago II (CHI2)	170.85.14.25	Future Use
Americas	Chicago II (CHI2)	2605:4300:2a10::38	Future Use
Americas	Los Angeles II (QLA2)	2605:4300:3710::38	Future Use
Americas	Los Angeles II (QLA2)	170.85.230.25	Future Use
Americas	Montreal I (YMQ1)	165.225.212.62	Future Use
Americas	Montreal I (YMQ1)	2605:4300:2711::40	Future Use
Americas	Santiago II (SCL2)	205.220.0.25	Live
Americas	Santiago II (SCL2)	2605:4300:e410::15	Future Use
Americas	São Paulo IV (SAO4)	147.161.128.56	Live
Americas	São Paulo IV (SAO4)	2605:4300:e311::40	Future Use
Americas	Washington IV (WAS4)	170.85.86.25	Future Use
Americas	Washington IV (WAS4)	2605:4300:2d10::15	Future Use
APAC	Chennai III (MAA3)	167.103.70.25	Future Use
APAC	Chennai III (MAA3)	2400:7aa0:2410::c	Future Use
APAC	Kolkata I (CCU1)	205.220.16.25	Live
APAC	Kolkata I (CCU1)	2400:7aa0:2910::15	Future Use
APAC	Kuala Lumpur II (KUL2)	205.220.70.25	Live
APAC	Kuala Lumpur II (KUL2)	2400:7aa0:2b10::15	Future Use
APAC	Mumbai VII (BOM7)	167.103.132.25	Future Use
APAC	Mumbai VII (BOM7)	2400:7aa0:2610::c	Future Use
APAC	Singapore V (SIN5)	167.103.60.25	Live
APAC	Singapore V (SIN5)	2400:7aa0:2310::38	Future Use
APAC	Sydney V (SYD5)	101.2.224.25	Live
APAC	Sydney V (SYD5)	2400:7aa0:2c10::15	Future Use
EMEA	Amsterdam III (AMS3)	87.58.118.25	Future Use
EMEA	Amsterdam III (AMS3)	2a03:eec0:3410::38	Future Use
EMEA	Manchester II (MAN2)	194.9.106.25	Future Use
EMEA	Manchester II (MAN2)	2a03:eec0:2e10::38	Future Use
EMEA	Tel Aviv II (TLV2)	87.58.78.25	Future Use
EMEA	Tel Aviv II (TLV2)	2a03:eec0:3010::38	Future Use

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Trivy and LiteLLM Supply Chain Incident (CVE-2026-33634) Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Fri, 27 Mar 2026 00:00:00 GMT

Zscaler has analyzed the supply chain compromises affecting the Trivy security scanner and LiteLLM. Analysis confirms no impact to Zscaler platforms, products, or internal systems, including AI Guard.

As a best practice customers should review their environments for the following impacted versions:

Trivy: Container images v0.69.5–v0.69.6
LiteLLM: Versions 1.82.7 and 1.82.8.

Actions if you have an impacted version:

Update/Revert: Upgrade Trivy to v0.69.7 or later and downgrade LiteLLM to v1.82.6.
Rotate Credentials: Update all API keys, cloud tokens, and environment variables associated with these tools.

Zscaler will continue to monitor the situation and update this post if new information emerges.

Frankfurt VI Datacenter Scheduled Maintenance - zscaler.net

Thu, 26 Mar 2026 19:02:37 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Frankfurt VI (FRA6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 27, 3:00 pm PDT (March 27, 22:00 UTC)

End time is March 27, 10:00 pm PDT (March 28, 5:00 UTC)

Update 3/17: Extended maintenance

Update - Sat, 28 Mar 2026 05:24:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Planned Maintenance Activity for ZPA platform service - private.zscaler.com

Thu, 26 Mar 2026 07:49:39 GMT

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Maintenance Window

02:00 - 05:30 UTC

15:00 - 19:00 UTC

Update - Sun, 29 Mar 2026 15:58:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Cloud Browser Isolation issue for Frankfurt Region - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Wed, 25 Mar 2026 14:30:36 GMT

Zscaler has identified an issue with Cloud Browser Isolation (CBI) impacting customers in Frankfurt Region. Affected customers may experience issue with new isolation session for Frankfurt region.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Wed, 25 Mar 2026 14:36:16 UTC

Zscaler took necessary steps to mitigated the issue. Customer are now able to create new new isolation session for Frankfurt region. We are considering this incident as resolved.

Update - Wed, 25 Mar 2026 14:36:28 UTC

This incident has been resolved. Please contact Zscaler Support if you have additional questions.

Oslo III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 25 Mar 2026 13:07:36 GMT

Zscaler has detected an issue with its Oslo III datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- Issue was related to Hardware Maintenance.

Latest Update - Wed, 25 Mar 2026 14:47:15 UTC

Update - Wed, 25 Mar 2026 13:29:50 UTC

Following further investigation, it was confirmed that the alerts were caused by Urgent Hardware Maintenance (https://trust.zscaler.com/zscaler.net/posts/28671). The hardware replacement is now complete, and all associated alerts have been cleared

Update - Wed, 25 Mar 2026 14:47:15 UTC

Urgent Oslo III (OSL3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Wed, 25 Mar 2026 10:53:54 GMT

Zscaler will be performing hardware maintenance in the Oslo III (OSL3) Datacenter.

Maintenance window,
Start: 2026-03-25 13:00 CEST
End: 2026-03-25 16:00 CEST
(i.e. 2026-03-25 12:00 - 2026-03-25 15:00 UTC)

Update - Wed, 25 Mar 2026 13:58:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI (BOM6) Datacenter Network Maintenance - zscaler.net

Wed, 25 Mar 2026 09:07:23 GMT

Zscaler will be performing hardware maintenance in Mumbai VI (BOM6) Datacenter .

Maintenance window:
Start: 2026-03-27 12:30 UTC
End: 2026-03-27 14:30 UTC
(Local Time 2026-03-27 18:00 - 2026-03-27 20:00 IST)

Update - Fri, 27 Mar 2026 19:23:52 UTC

This activity has been completed at 2026-03-27 14:30 UTC. Please contact Zscaler Support if you have additional questions.

Los Angeles I Datacenter Scheduled Maintenance - zscalertwo.net

Wed, 25 Mar 2026 07:26:12 GMT

Zscaler will be performing hardware maintenance in Los Angeles I (QLA1) Datacenter.

Maintenance window:
Start: 2026-03-26 02:00 UTC
End: 2026-03-26 04:00 UTC
(Local Time 2026-03-25 19:00 - 2026-03-25 21:00)

Update - Thu, 26 Mar 2026 03:59:14 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming Data Center Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 23 Mar 2026 19:14:53 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on February 4, 2026, we would like to remind you of the upcoming data center expansion at the location listed below. These would be effective anytime on or after April 5, 2026.

Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
APAC	Mumbai VI	101.2.248.0/23	Expansion of existing DC

We recommend that you add the IP address ranges listed in the “Zscaler Aggregate IP Address Ranges’’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

https://config.zscaler.com/zscaler.net/hubs

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Reminder Notification for Additions of HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Mon, 23 Mar 2026 19:04:32 GMT

Dear Customer,

In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on February 4, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after April 5, 2026.

CIDR	Notes
205.220.118.0/23	New addition to Required Hub IP addresses
101.2.244.0/23	New addition to Required Hub IP addresses
199.168.148.0/22	Removed from Recommended section

Please update your firewall policy rules and any upstream access control lists to allow the new IP address range to avoid any service disruption.

For more information, please visit:

https://config.zscaler.com/zscloud.net/hubs

https://config.zscaler.com/zscalerone.net/hubs

https://config.zscaler.com/zscalertwo.net/hubs

https://config.zscaler.com/zscalerthree.net/hubs

https://config.zscaler.com/zdxcloud.net/hubs

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Abu Dhabi I and Dubai II Data Center Issue - zscloud.net

Mon, 23 Mar 2026 06:34:55 GMT

Zscaler has detected an issue with its Abu Dhabi I and Dubai II datacenter on the zcloud.net cloud and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to a routing error that impacted a limited subset of customers.

Latest Update - Mon, 23 Mar 2026 11:28:17 UTC

Based on continuous monitoring and positive customer feedback, we have confirmed that the issues have subsided and the mitigation remains stable. Consequently, we are marking this incident as resolved.

Update - Mon, 23 Mar 2026 07:05:38 UTC

We are making progress in isolating the cause of the issue and further updates will be shared as available.

Update - Mon, 23 Mar 2026 08:14:41 UTC

We have identified the issue as an incorrect routing configuration and are actively implementing corrective changes. Service has been restored on a portion of the affected infrastructure. We are continuing remediation on the remaining components while monitoring stability and validating full restoration of BGP sessions and route advertisements. Additional updates will be provided once validation is complete.

Update - Mon, 23 Mar 2026 08:28:51 UTC

Zscaler team has resolved the routing issue that impacted a limited subset of customers. The issue was caused by a routing configuration problem that affected BGP route advertisements, which prevented some customer traffic from being routed normally. Corrective changes have been applied across the affected infrastructure and service has stabilized. We are continuing to monitor to ensure ongoing routing health and will provide additional updates if conditions change.

Update - Mon, 23 Mar 2026 11:28:17 UTC

Dubai I Data Center Issue - zscloud.net

Mon, 23 Mar 2026 05:54:43 GMT

Zscaler has detected an issue with its Dubai I datacenter on zscloud.net and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to a routing error that impacted a limited subset of customers.

Latest Update - Mon, 23 Mar 2026 11:27:14 UTC

Update - Mon, 23 Mar 2026 06:17:40 UTC

We are investigating the issue and have expanded the scope of impact to include the Abu Dhabi I and Dubai II data center as well. A separate trust is posted for the same.

Update - Mon, 23 Mar 2026 07:03:25 UTC

We are making progress in isolating the cause of the issue and further updates will be shared as available.

Update - Mon, 23 Mar 2026 08:13:53 UTC

Update - Mon, 23 Mar 2026 08:29:49 UTC

Update - Mon, 23 Mar 2026 11:27:14 UTC

Canberra I Data Center Issue - zscalerthree.net

Mon, 23 Mar 2026 04:50:22 GMT

Zscaler has detected an issue with its Canberra I datacenter on the zscalerthree.net cloud and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A software issue caused a subset of our DLP scanning nodes to become unstable, resulting in brief interruptions and elevated errors for DLP inspection for some customers.

Latest Update - Tue, 24 Mar 2026 05:00:15 UTC

Following the actions previously taken by Zscaler, our systems remain fully operational and the incident has been resolved.

Update - Mon, 23 Mar 2026 06:00:46 UTC

Zscaler is prioritizing this issue and is actively working to mitigate the problem. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.

Update - Mon, 23 Mar 2026 07:52:24 UTC

Zscaler has implemented mitigation measures to resolve the recent service disruption. Service stability has been restored, and we will continue to monitor the environment for an extended period to ensure continued performance. We appreciate your patience during this time.

Update - Mon, 23 Mar 2026 19:18:21 UTC

Services have remained stable following mitigation, and Zscaler continues to monitor to ensure sustained service stability.

Update - Tue, 24 Mar 2026 05:00:15 UTC

Following the actions previously taken by Zscaler, our systems remain fully operational and the incident has been resolved.

San Francisco IV (SJC4) Datacenter Network Maintenance - zscalertwo.net, zscalerthree.net

Mon, 23 Mar 2026 02:12:24 GMT

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
Start: 2026-03-25 03:30 UTC
End: 2026-03-25 06:30 UTC
(Local Time 2026-03-24 20:30 - 2026-03-24 23:30)

Update - Wed, 25 Mar 2026 04:00:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZIdentity Portal Issue - zslogin.net

Sat, 21 Mar 2026 11:49:08 GMT

Zscaler is investigating an issue with the ZIdentity Portal on the zslogin.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to a recent service update.

Update - Sat, 21 Mar 2026 12:10:56 UTC

The Zscaler team has identified the root cause and implemented the necessary measures to resolve the issue; this incident is now resolved.

Capetown IV Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sat, 21 Mar 2026 11:15:51 GMT

Zscaler has detected an issue with our Capetown IV datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause - Issue was related to fiber in third party network provider infrastructure.

Latest Update - Mon, 23 Mar 2026 16:26:20 UTC

Following the actions previously taken by network provider, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Update - Sat, 21 Mar 2026 11:34:01 UTC

Update - Sat, 21 Mar 2026 15:02:04 UTC

Zscaler has identified intermittent packet loss on a network path impacting connectivity between the Cape Town (CPT4) data center and backend services. This resulted in intermittent service degradation for a subset of customers. As part of mitigation, traffic has been rerouted to alternate infrastructure paths, which are demonstrating improved stability and performance. Zscaler is working with the network provider, who has confirmed a fiber outage as the underlying cause. Repair activities are expected to begin shortly. Zscaler continues to apply mitigation measures and closely monitor the situation. Further updates will be provided as more information becomes available.

Update - Sat, 21 Mar 2026 16:42:25 UTC

The network provider has confirmed that the issue within their infrastructure has been resolved. Zscaler has validated that services are restored and operating normally, with stability observed following the mitigation measures implemented earlier. We will continue to monitor closely to ensure ongoing service stability.

Update - Mon, 23 Mar 2026 16:26:20 UTC

CBI Original URL Experience Degradation - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 20 Mar 2026 00:00:00 GMT

Zscaler is actively implementing mitigation measures for an intermittent, low-impact issue affecting the Zscaler Internet Access (ZIA) Service Edge. As part of our troubleshooting and remediation process, we are making adjustments to a specific feature indicated by our data to be triggering the issue.

As a result, some Cloud Browser Isolation (CBI) customers who have enabled the newly released Original URL feature in their Isolation Profile may periodically still see the full CBI URL instead of the original URL. While we understand this is a degradation in experience for end users, there should be no impact to core CBI functionality.

Rio de Janeiro I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 20 Mar 2026 18:55:07 GMT

Zscaler will be enabling IPv6 at our Rio de Janeiro I (RIO1) Data Center. During the maintenance window the services through RIO1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 31, 2:00 pm PDT (March 31, 21:00 UTC)

End time is March 31, 800 pm PDT (April 1, 3:00 UTC)

Update 3/23: Maintenance Postponed
Update 3/30: Maintenance Rescheduled
Update 3/31: Extended time

Update - Wed, 01 Apr 2026 03:03:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Fri, 20 Mar 2026 18:46:13 GMT

Zscaler will be enabling IPv6 at our Atlanta III (ATL3) Data Center. During the maintenance window the services through ATL3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is April 6, 6:00 pm PDT (April 7, 1:00 UTC)

End time is April 6, 11:00 pm PDT (April 7, 6:00 UTC)

Update 3/23: Maintenance Postponed
Update 4/3: Maintenance Rescheduled

Update - Tue, 07 Apr 2026 04:51:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Fri, 20 Mar 2026 16:44:11 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Atlanta II, Atlanta III, Los Angeles, Los Angeles II datacenter on the zscaler.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 20 Mar 2026 18:06:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Dusseldorf 1 and Frankfurt 6 datacenters - zscaler.net

Fri, 20 Mar 2026 06:15:54 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dusseldorf 1 and Frankfurt 6 datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 11:30 PM Pacific Time on March 19, 2026 (Friday, March 20, 2026 6:30 AM UTC), and can take up to 1 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 20 Mar 2026 07:45:21 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - AMER Region - zscalertwo.net

Fri, 20 Mar 2026 00:27:58 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the AMER region's datacenters of zscalertwo.net cloud. This maintenance is scheduled for Thursday at 9:00 PM Pacific Time on Mar 19, 2026 (Friday, Mar 20, 2026 4:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on New York 3 and 4 datacenters - zscaler.net

Thu, 19 Mar 2026 08:09:13 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the New York 3 and 4 datacenter on the zscaler.net cloud. This maintenance is scheduled for Thursday at 1:30 AM Pacific Time on March 19, 2026 (Thursday, March 19, 2026 8:30 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 19 Mar 2026 09:19:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

User Authentication Issue on Sao Paulo II - zscaler.net, zscalertwo.net, zscloud.net

Thu, 19 Mar 2026 04:52:02 GMT

Zscaler has detected an issue with its Sao Paulo II datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to resource contention on some nodes

Latest Update - Tue, 07 Apr 2026 04:29:36 UTC

Zscaler has been monitoring the Sao Paulo II (SAO2) datacenter following the previously reported recurring issue. We have not observed any further impact, and services are operating as expected. The issue is now resolved. We will continue to monitor closely to ensure ongoing stability.

Update - Thu, 19 Mar 2026 05:51:21 UTC

We have confirmed that services are now working as expected and the issue stands as mitigated. While performance has stabilized, our teams remain in a state of high vigilance and will continue to monitor the infrastructure closely to ensure a seamless experience for all users.

Update - Fri, 20 Mar 2026 04:45:03 UTC

The previously mitigated issue at the Sao Paulo II datacenter has resurfaced. Our teams are investigating the recurrence further and checking for the root cause.

Update - Fri, 20 Mar 2026 06:24:22 UTC

Zscaler has successfully mitigated the impact. While a permanent fix remains under investigation, the team will continue to monitor the environment closely for extended period of time. Should the issue recur, we will perform targeted restarts of the impacted instances as a temporary corrective measure.

Update - Tue, 07 Apr 2026 04:29:36 UTC

Planned Maintenance Activity for ZPA authentication service - private.zscaler.com

Thu, 19 Mar 2026 09:43:15 GMT

We will be performing planned maintenance on our ZPA authentication platform infrastructure to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Brief retries or elevated latency for new auth requests might be seen during connection re‑establishment.
Transient errors during auth is possible; retry should succeed.

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sat, 21 Mar 2026 03:18:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Sydney V Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 18 Mar 2026 21:34:23 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Sydney V (SYD5) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on March 19, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update - Fri, 20 Mar 2026 02:59:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Client Connector (ZCC) Authentication Issues - zscalerone.net

Wed, 18 Mar 2026 19:42:55 GMT

Zscaler is aware and investigating reports on an issue with ZCC Network errors on its zscalerone.net Cloud. Affected users may experience 'network connection failed' errors when attempting to log into Zscaler Client Connector (ZCC). Users who are already logged in can access services normally.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: The issue was caused by an unresponsive authentication component, resulting in intermittent authentication failures for a subset of users. A detailed Root Cause Analysis (RCA) will be shared separately.

Latest Update - Wed, 18 Mar 2026 22:39:23 UTC

Update - Wed, 18 Mar 2026 20:27:45 UTC

Zscaler has taken necessary actions to mitigate the issue. We are monitoring the environment for continued stability.

Update - Wed, 18 Mar 2026 22:39:23 UTC

Planned Maintenance Activity for ZPA platform service - private.zscaler.com

Wed, 18 Mar 2026 10:46:13 GMT

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Maintenance Window

02:00 - 05:30 UTC

15:00 - 19:00 UTC

Update - Sun, 22 Mar 2026 15:40:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV (SJC4) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Tue, 17 Mar 2026 18:40:20 GMT

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
Start: 2026-03-19 06:00 UTC
End: 2026-03-19 14:00 UTC
(Local Time 2026-03-18 23:00 - 2026-03-19 07:00)

Update - Thu, 19 Mar 2026 11:59:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

SaaS Application Activity Data Not Displaying in Activity Logs - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 16 Mar 2026 00:00:00 GMT

Activity Logs are currently not displaying SaaS application activity data. Zscaler is actively working to resolve this issue.

Who is impacted?
ZIA customers who have onboarded and configured Data-at-Rest scanning for SaaS applications may temporarily be unable to view SaaS-related activity data in Activity Logs.

When will this be resolved?
A fix is currently being deployed and is expected to be completed across all Zscaler clouds by March 22, 2026.

What are my next steps?
No action is required from customers at this time. Zscaler will continue to monitor the deployment to ensure full restoration of activity log visibility.

Latest Update - Mon, 23 Mar 2026 04:09:49 UTC

The fix has been deployed on the remaining clouds and the issue is now resolved.

Update - Tue, 17 Mar 2026 06:28:51 UTC

As per the latest update, the fix has been deployed across the ZS1, ZSC, and ZSN clouds, and deployment on ZS2 and ZS3 is scheduled to complete by March 22, 2026.

Update - Mon, 23 Mar 2026 04:09:49 UTC

The fix has been deployed on the remaining clouds and the issue is now resolved.

Deprecation of Individual Administrative UIs - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zslogin.net

Mon, 16 Mar 2026 00:00:00 GMT

What is changing?

Zscaler is deprecating individual administrative User Interfaces (UIs). Customers must migrate to ZIdentity and Experience Center, Zscaler’s centralized administrative and insights platform, to take advantage of new features and innovations.

Who is impacted?

All customers not currently using ZIdentity for administrative purposes must complete the migration to have access to new features and innovations.

Key Information

Access Experience Center: To use the latest administrative capabilities, customers must complete migration to ZIdentity for Administrators and access Experience Center (https://console.zscaler.com).
Exclusive Features Beginning on April 1st 2026: Starting in April 2026, all new features and product enhancements are available exclusively on Experience Center.
Innovations Exclusive to Experience Center: Risk360, Health360, Zero Trust Branch, and all future innovations are available only on Experience Center.
Legacy UIs Maintenance Mode on April 1st 2026: Legacy administrative UIs will go into maintenance mode starting in April 2026. This means you can still apply configuration changes in the legacy administrative UIs but no new features will be added to them. All new developments will be exclusive to the Experience Center.
Legacy UIs Deprecation on September 30th 2026: Legacy administrative UIs will be deprecated
Executive dashboards with key insights that are showcased in the Executive Insights App (the new mobile CXO app) are only present in Experience Center.

To learn more, read our blog post: Embracing the Future of Zero Trust Administration with ZIdentity and Experience Center.

Next Steps

Engage your Zscaler Account team: Your Zscaler Account team or Technical Success Manager can assist with planning and completing your migration to ZIdentity and enabling Experience Center.
Complete your migration to ZIdentity: Visit the ZIdentity migration page to submit your request for migration. Review the ZIdentity migration documentation for detailed migration guidance. The time required to complete migration depends on your organization, but it can be as quick as setting up a new connection with your identity provider.
Start using the Experience Center at https://console.zscaler.com.

What if I have more questions?

If you have additional questions, contact Zscaler Support via the Support link in the Zscaler Internet Access or ZIdentity Admin Portal, or call us at +1 (408) 752-5885. Within the U.S., you can use +1 (844) 971-0010.

Update 3/25/26: Updated verbiage

Zscaler Microsegmentation Log Forwarding Issue - private.zscaler.com

Mon, 16 Mar 2026 21:21:34 GMT

Zscaler is investigating an issue with the Zscaler Microegmentation's log forwarding service via Log Streaming Service (LSS) on its private.zscaler.com cloud. The logs forwarding via LSS is temporarily disabled. This does not impact the core Microsegmentation functionality and all the logs will continue to be visible in the Administration UI.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: The issue was caused by a software defect in the service responsible for processing and forwarding logs for Zscaler Microsegmentation.

Latest Update - Thu, 19 Mar 2026 22:38:01 UTC

Zscaler has implemented the necessary fix, and log forwarding via LSS has been fully restored. Post-deployment monitoring confirms the service is operating as expected, and services have returned to normal.

Update - Mon, 16 Mar 2026 23:07:42 UTC

To further mitigate potential impact, log forwarding via LSS has been temporarily disabled while Zscaler teams actively investigate the root cause and implement the necessary fix.

Update - Wed, 18 Mar 2026 01:02:33 UTC

Zscaler has identified a mitigation and are currently validating the fix. Upon successful validation, the change will be deployed to the production, following which log forwarding via LSS will be restored. Zscaler will continue to provide updates as progress is made.

Update - Thu, 19 Mar 2026 22:38:01 UTC

Sitereview Portal Validation Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Mon, 16 Mar 2026 00:00:00 GMT

Site review is used by customers and their users to submit URL categorization and review requests to Zscaler. To provide a more secure environment for our ZIA customers, Zscaler is refining how the Site review portal authorizes URL recategorization and review requests. Previously, the portal accepted requests if either the Source IP or the X Forwarded For header belonged to a Zscaler IP address range. As part of a security enhancement, we are removing reliance on the X Forwarded For header. Access will now be restricted to requests originating from a recognized Zscaler Source IP address range or an explicitly whitelisted non Zscaler Source IP.

What Changed

Validation Logic Update: We are moving from a model that allows either a Zscaler Source IP OR a Zscaler XFF header to a model that requires a Zscaler Source IP.
Deprecation of XFF Headers: The portal will no longer consider the X-Forwarded-For header as a valid identifier for request origin.

Impacted Areas

Service: Sitereview Portal (https://sitereview.zscaler.com/)
Users: ZIA customers performing URL recategorization reviews.

What is Not Allowed

Submissions from non-Zscaler Source IPs that rely solely on the XFF header to identify as a Zscaler customer will no longer be accepted.

What is Allowed

Submissions originating from any valid Zscaler Source IP address.
Submissions from specific customer-owned (non-Zscaler) Source IPs that have been explicitly whitelisted by Zscaler.

Expected Behavior

To ensure minimal disruption, Zscaler has already proactively whitelisted known existing non-Zscaler Source IPs used by our customers. We expect most users to experience no change in service.

For users where submission was previously working but stopped working after a change, they should do the following:

Confirm they are accessing Sitereview from a Zscaler IP address (i.e., traffic is egressing through Zscaler).
If they must submit from a non-Zscaler egress IP, contact the Zscaler Support Team to request whitelisting (allowlisting) of their non-Zscaler Source IP.

Implementation Timeline

This update will be fully implemented after April 4, 2026.

Summary

Zscaler is updating the request validation logic for the Sitereview portal (sitereview.zscaler.com) to enhance security. Effective April 4, 2026, the portal will transition to strictly validating the Source IP address for all submissions.

Zscaler Client Connector Portal Issue - zscaler.net, zscloud.net, zscalerthree.net

Mon, 16 Mar 2026 07:33:37 GMT

Zscaler has detected an issue with Zscaler Client Connector Portal Issue on its zscalerthree.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue was caused by a software defect introduced during a recent system update.

Latest Update - Mon, 16 Mar 2026 11:24:10 UTC

Based on our continuous monitoring, we have confirmed that all services are working as expected and performing within normal parameters. Consequently, we are now marking this incident as Resolved.

Update - Mon, 16 Mar 2026 07:55:31 UTC

Zscaler has identified the root cause and is actively working on a fix. We appreciate your patience and understanding as we resolve this issue. Additional updates will be provided as more information becomes available.

Update - Mon, 16 Mar 2026 09:08:24 UTC

Zscaler has successfully deployed the software fix to address the ongoing service disruption. The Incident is now resolved, and all portal features have been restored to normal operation.

Update - Mon, 16 Mar 2026 09:36:42 UTC

The issue previously identified on the ZS3 cloud has resurfaced on the ZSN cloud. Although initial reports were limited to ZS3, we are now extending the fix to both the ZSN and ZSC clouds to ensure a full resolution across all impacted environments.

Update - Mon, 16 Mar 2026 09:58:56 UTC

The fix has now been extended to the ZSN cloud, and service should be restored for all affected customers. Deployment of the fix for the ZSC cloud is currently in progress and is expected to be completed shortly as a proactive measure to ensure stability. While the deployment is ongoing, internal monitoring indicates that the ZSC cloud remains stable with no active issues reported.

Update - Mon, 16 Mar 2026 10:33:41 UTC

The fix has now been extended to the ZSC cloud, and service should be restored for all affected customers. The issue is now mitigated; however, we will continue monitoring the environment for some time to ensure ongoing stability.

Update - Mon, 16 Mar 2026 11:24:10 UTC

Based on our continuous monitoring, we have confirmed that all services are working as expected and performing within normal parameters. Consequently, we are now marking this incident as Resolved.

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.zsdpc.net

Mon, 16 Mar 2026 04:07:57 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on March 16th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Mon, 16 Mar 2026 05:52:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - VZEN nodes - zscalertwo.net

Sun, 15 Mar 2026 01:35:11 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the VZEN nodes in zscalertwo.net cloud. The maintenance will happen across VZEN nodes during the window, beginning at 06:30 PM Pacific Time on Saturday, March 14, 2026 (Sunday, March 15, 2026 01:30 AM UTC) and continuing for up to 5 hours. VZEN's services will be restarted as part of this change and service for your end users might be disrupted during the window. All logs will be collected and available after maintenance is complete.

Update - Sun, 15 Mar 2026 06:26:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Zurich datacenter - zscloud.net

Sat, 14 Mar 2026 16:55:41 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Zurich datacenter on the zscloud.net cloud. This maintenance is scheduled for Saturday at 1:00 PM Pacific Time on March 14, 2026 (Saturday, March 14, 2026 8:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 14 Mar 2026 21:05:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Client Connector-Based End User Notifications Issue - zscaler.net

Sat, 14 Mar 2026 06:10:45 GMT

Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on its zscaler.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- Issue was related to node.

Update - Sat, 14 Mar 2026 06:52:20 UTC

Zscaler has implemented mitigation measures, and the incident is now resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Scheduled Maintenance Extended - zscaler.net

Sat, 14 Mar 2026 05:49:48 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscaler.net cloud by 2 hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 14 Mar 2026 08:00:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dubai I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net

Sat, 14 Mar 2026 01:31:40 GMT

Zscaler will be enabling IPv6 at our Dubai I (DXB1) Data Center. During the maintenance window the services through DXB1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 19, 9:00 am PST (March 19, 16:00 UTC)

End time is March 19, 3:00 pm PST (March 19, 22:00 UTC)

Update - Thu, 19 Mar 2026 21:39:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dubai I Datacenter Scheduled Maintenance- Service Expansion - zscloud.net

Sat, 14 Mar 2026 01:29:26 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Dubai I (DXB1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 7, 9:00 am PDT (April 7, 16:00 UTC)

End time is April 7, 2:00 pm PDT (April 7, 21:00 UTC)

Update 3/19: Maintenance postponed
Update 4/3: Maintenance Rescheduled

Update - Tue, 07 Apr 2026 20:53:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Sat, 14 Mar 2026 00:08:35 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on March 13, 2026, we would like to notify you of the upcoming data center expansions at the locations listed below. These would be available anytime on or after May 12, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	New York IV	198.14.96.0/23	Expansion of existing data center
Americas	New York IV	198.14.98.0/23	Expansion of existing data center
Americas	New York IV	198.14.100.0/23	Expansion of existing data center
Americas	New York IV	198.14.102.0/23	Expansion of existing data center
EMEA	Paris IV	137.31.8.0/23	Expansion of existing data center
EMEA	Paris IV	137.31.10.0/23	Expansion of existing data center
EMEA	Paris II	137.31.12.0/23	Expansion of existing data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Singapore IV Datacenter Scheduled Maintenance - zscaler.net, zscloud.net

Fri, 13 Mar 2026 20:54:58 GMT

Zscaler will be enabling IPv6 at our Singapore IV (SIN4) Data Center. During the maintenance window the services through SIN4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 18, 9:00 am PST (March 18, 16:00 UTC)

End time is March 18, 3:00 pm PST (March 18, 22:00 UTC)

Update - Wed, 18 Mar 2026 22:18:40 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Fri, 13 Mar 2026 17:25:04 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester I (MAN1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 2, 200 pm PDT (April 2, 21:00 UTC)

End time is April 2, 7:00 pm PDT (April 3, 200 UTC)

Update 3/18: Maintenance postponed
Update 3/31: Maintenance rescheduled
Update 4/1: Time Adjustment
Update 4/2: Extended Maintenance

Update - Fri, 03 Apr 2026 01:25:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I Datacenter Scheduled Maintenance - zscalertwo.net

Fri, 13 Mar 2026 17:23:30 GMT

Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center. During the maintenance window the services through MAN1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 18, 11:00 am PST (March 18, 18:00 UTC)

End time is March 18, 4:00 pm PST (March 18, 23:00 UTC)

Update - Wed, 18 Mar 2026 20:47:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vienna I Datacenter Scheduled Maintenance - zscloud.net, zscalerthree.net

Fri, 13 Mar 2026 17:09:15 GMT

Zscaler will be enabling IPv6 at our Vienna I (VIE1) Data Center. During the maintenance window the services through VIE1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 16, 1:00 pm PST (March 16, 8:00 UTC)

End time is March 16, 7:00 pm PST (March 17, 2:00 UTC)

Update - Tue, 17 Mar 2026 00:20:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I Datacenter Scheduled Maintenance - zscloud.net

Fri, 13 Mar 2026 16:57:31 GMT

Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center. During the maintenance window the services through MAN1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 17, 11:00 am PST (March 17, 18:00 UTC)

End time is March 17, 6:00 pm PST (March 18, 1:00 UTC)

Update 3/17: Extending maintenance

Update - Wed, 18 Mar 2026 01:01:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I Datacenter Scheduled Maintenance - Service Expansion - zscloud.net

Fri, 13 Mar 2026 16:55:47 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester I (MAN1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 2, 2:00 pm PDT (April 2, 21:00 UTC)

End time is April 2, 7:00 pm PDT (April 3, 2:00 UTC)

Update 3/17: Extending Maintenance
Update 3/17: Maintenance Postponed
Update 3/31: Maintenance Rescheduled
Update 4/1: Time Adjustment
Update 4/2: Extending Maintenance

Update - Fri, 03 Apr 2026 01:24:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Taipei II Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net

Fri, 13 Mar 2026 16:47:13 GMT

Zscaler will be enabling IPv6 at our Taipei II (TPE2) Data Center. During the maintenance window the services through TPE2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 17, 9:00 am PST (March 17, 16:00 UTC)

End time is March 17, 2:00 pm PST (March 17, 21:00 UTC)

Update - Tue, 17 Mar 2026 21:46:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Taipei II Datacenter Scheduled Maintenance - Service Expansion - zscloud.net

Fri, 13 Mar 2026 16:43:01 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Taipei II (TPE2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is April 8, 9:00 am PDT (April 8, 16:00 UTC)

End time is April 8, 4:00 pm PDT (April 8, 23:00 UTC)

Update 3/17: Maintenance Postponed
Update 4/3: Maintenance Rescheduled
Update 4/8: Maintenance Extended

Update - Wed, 08 Apr 2026 22:32:14 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Commercial Salesforce Security Notification - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Fri, 13 Mar 2026 00:00:00 GMT

On March 10, 2026, Zscaler was made aware of a campaign targeted at the Salesforce Experience Center impacting a large number of Salesforce customers, including Zscaler. Following guidance from Salesforce, Zscaler completed remediation of the incident on March 11, 2026.

Unauthorized access to personal data was limited to the Name and Email Address field from the Commercial Zscaler Community Portal. The scope of the incident was confined to the Zscaler Commercial Salesforce tenant and did not impact the Zscaler Federal Salesforce tenant.

Zscaler's products, services and/or underlying systems and infrastructure were not impacted and no sensitive PII was accessed or exposed.

Paris IV Datacenter Scheduled Maintenance - zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 13 Mar 2026 16:20:07 GMT

Zscaler will be enabling IPv6 at our Paris IV (PAR4) Data Center. During the maintenance window the services through PAR4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 16, 10:00 am PST (March 16, 17:00 UTC)

End time is March 16, 3:00 pm PST (March 16, 22:00 UTC)

Update - Mon, 16 Mar 2026 20:03:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Oslo III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 13 Mar 2026 12:41:25 GMT

Zscaler has detected an issue with our Oslo III datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Issue was related to faulty hardware.

Latest Update - Fri, 13 Mar 2026 13:53:24 UTC

Zscaler infrastructure team identified a faulty network switch through proactive monitoring. The issue was resolved by bypassing the defective hardware and rerouting traffic through a redundant backup switch. Connectivity has been fully restored and remains stable.

Update - Fri, 13 Mar 2026 12:52:33 UTC

Service has stabilized and alerts have cleared. We remain in a period of active monitoring while we investigate the root cause of the disruption.

Update - Fri, 13 Mar 2026 13:53:24 UTC

Zscaler Client Connector-Based End User Notifications Issue - zscaler.net

Fri, 13 Mar 2026 11:48:59 GMT

Root cause- Issue was related to node.

Update - Fri, 13 Mar 2026 12:16:51 UTC

China Premium and China Premium Plus Datacenters Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 16 Mar 2026 18:22:20 GMT

Beijing IV, Beijing V and Shanghai VI DCs network providers have advised maintenance work as below. During the maintenance window, China Premium and China Premium Plus services within these data centres may experience intermittent disconnections.

Start Time: 2026-03-20 18:00:00 UTC
End Time: 2026-03-20 20:00:00 UTC
(Datacenters' Local Time 2026-03-21 02:00 - 2026-03-21 04:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 20 Mar 2026 19:39:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Los Angeles, Los Angeles II, Seattle, San Francisco IV, and Denver III datacenters - zscalertwo.net

Thu, 12 Mar 2026 23:02:39 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Los Angeles, Los Angeles II, Seattle, San Francisco IV, and Denver III datacenters on the zscalertwo.net cloud. This maintenance is scheduled for Thursday at 11:00 PM Pacific Time on Mar 12, 2026 (Friday, Mar 13, 2026 06:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 13 Mar 2026 09:06:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Atlanta II, Atlanta III, Washington DC, Washington DC IV, Miami III, and Boston I datacenters - zscalertwo.net

Thu, 12 Mar 2026 22:42:42 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Atlanta II, Atlanta III, Washington DC, Washington DC IV, Miami III, and Boston I datacenters on the zscalertwo.net cloud. This maintenance is scheduled for Thursday at 5:00 PM Pacific Time on Mar 12, 2026 (Friday, Mar 13, 2026 12:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 13 Mar 2026 02:37:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Planned Maintenance Activity for ZPA authentication service - zpatwo.net

Fri, 13 Mar 2026 09:49:30 GMT

Brief retries or elevated latency for new auth requests might be seen during connection re‑establishment.
Transient errors during auth is possible; retry should succeed.

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sun, 15 Mar 2026 16:15:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI and User Authentication Issues - zscaler.net

Thu, 12 Mar 2026 09:16:51 GMT

Zscaler has detected an issue with the administration UI and user authentication on its zscaler.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A Central Authority (CA) issue triggered a CA re-election.

Latest Update - Thu, 12 Mar 2026 12:22:02 UTC

Update - Thu, 12 Mar 2026 09:29:52 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Thu, 12 Mar 2026 12:22:02 UTC

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net

Thu, 12 Mar 2026 04:00:26 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on March 12th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Thu, 12 Mar 2026 06:03:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Rio de Janeiro I Datacenter Scheduled Maintenance - zscalertwo.net

Wed, 11 Mar 2026 19:54:37 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Rio de Janeiro I (RIO1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 12, 6:00 pm PST (March 13, 1:00 UTC)

End time is March 12, 11:00 pm PST (March 13, 6:00 UTC)

Update - Fri, 13 Mar 2026 06:04:13 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalerone.net

Wed, 11 Mar 2026 16:15:36 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Thursday at 1:00 AM Pacific Time on Mar 12, 2026 (Thursday, Mar 12, 2026 8:00 AM UTC), and can take up to 3 hours to complete.

During maintenance, the Zscaler Client Connector Portal will be in maintenance mode. As a result, access to policy management and reporting will not be available. Existing devices that are already enrolled will not be affected, but there may be intermittent failures in registering new devices. Rest assured, all logs will be collected and made available once the maintenance mode window concludes.

Update - Thu, 12 Mar 2026 10:57:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Planned Maintenance Activity for ZPA platform service - private.zscaler.com

Thu, 12 Mar 2026 06:08:28 GMT

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sun, 15 Mar 2026 05:02:19 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reporting and Logging Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 11 Mar 2026 11:14:56 GMT

Zscaler is currently investigating reports of issues with Reporting and Logging on its zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud. Your organization's policies are being enforced. All user logs are being collected and will be available at the resolution of this incident.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Zscaler has applied a mitigation to address the issue affecting report retrieval in the ZIA portal. Reports and data are now accessible again.

Latest Update - Wed, 11 Mar 2026 13:09:13 UTC

Update - Wed, 11 Mar 2026 12:05:41 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 11 Mar 2026 13:09:13 UTC

Urgent Maintenance on Dallas I, Dallas II, New York III, New York IV datacenters - zscalerthree.net

Wed, 11 Mar 2026 05:44:23 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dallas I, Dallas II, New York III, New York IV datacenters on the zscalerthree.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Wed, 11 Mar 2026 10:02:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on AMER region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 11 Mar 2026 00:48:12 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the AMER region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 PM Pacific Time on Mar 14, 2026 (Sunday, Mar 15, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Latest Update - Fri, 10 Apr 2026 15:00:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Wed, 11 Mar 2026 23:50:18 UTC

This maintenance is now scheduled for Sunday at 2:00 AM Pacific Time on Mar 15, 2026 (Sunday, Mar 15, 2026 09:00 AM UTC), and can take up to 4 hours to complete.

Update - Fri, 10 Apr 2026 15:00:57 UTC

This activity was completed within the mentioned timeframe. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on APAC region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 11 Mar 2026 00:43:53 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the APAC region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 AM Pacific Time on Mar 14, 2026 (Saturday, Mar 14, 2026 01:00 PM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 14 Mar 2026 15:30:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on EMEA region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 11 Mar 2026 00:40:59 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the EMEA region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 6:00 PM Pacific Time on Mar 13, 2026 (Saturday, Mar 14, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Latest Update - Sun, 15 Mar 2026 06:28:13 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Wed, 11 Mar 2026 23:43:08 UTC

This maintenance is now scheduled for Saturday at 6:00 PM Pacific Time on Mar 14, 2026 (Sunday, Mar 15, 2026 01:00 AM UTC), and can take up to 4 hours to complete.

Update - Sun, 15 Mar 2026 06:28:13 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on Oceania region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 11 Mar 2026 00:37:42 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the Oceania region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 2:00 AM Pacific Time on Mar 13, 2026 (Friday, Mar 13, 2026 09:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Latest Update - Sat, 14 Mar 2026 12:56:39 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Wed, 11 Mar 2026 23:27:26 UTC

This maintenance is now scheduled for Saturday at 2:00 AM Pacific Time on Mar 14, 2026 (Saturday, Mar 14, 2026 09:00 AM UTC), and can take up to 4 hours to complete.

Update - Sat, 14 Mar 2026 12:56:39 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I Datacenter Scheduled Maintenance - zscalerthree.net

Tue, 10 Mar 2026 20:54:21 GMT

Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center. During the maintenance window the services through MAN1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 13, 11:00 am PST (March 13, 18:00 UTC)

End time is March 13, 800 pm PST (March 14, 03:00 UTC)

Update 3/13/26: Extending Maintenance
Update 3/13/26: Extending Maintenance

Update - Sat, 14 Mar 2026 03:02:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I Datacenter Scheduled Maintenance - zscaler.net

Tue, 10 Mar 2026 20:52:36 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester I (MAN1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 13, 11:00 am PST (March 13, 18:00 UTC)

End time is March 13, 4:00 pm PST (March 13, 23:00 UTC)

Update - Fri, 13 Mar 2026 21:48:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Singapore IV Datacenter Scheduled Maintenance - zscalertwo.net

Tue, 10 Mar 2026 18:25:39 GMT

Zscaler will be enabling IPv6 at our Singapore IV (SIN4) Data Center. During the maintenance window the services through SIN4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 12, 9:00 am PST (March 12, 16:00 UTC)

End time is March 12, 2:00 pm PST (March 12, 21:00 UTC)

Update - Thu, 12 Mar 2026 21:11:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Singapore IV Datacenter Scheduled Maintenance - zscalerthree.net

Tue, 10 Mar 2026 18:23:18 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Singapore IV (SIN4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream access lists (ACLs) to allow all IP address ranges for this DC.

For more information, please visit:

Maintenance Window:

Start time is March 12, 9:00 am PST (March 12, 16:00 UTC)

End time is March 12, 2:00 pm PST (March 12, 21:00 UTC)

Update - Thu, 12 Mar 2026 21:12:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hong Kong III Datacenter Scheduled Maintenance - zscaler.net, zscloud.net, zscalerthree.net

Tue, 10 Mar 2026 18:14:16 GMT

Zscaler will be enabling IPv6 at our Hong Kong III (HKG3) Data Center. During the maintenance window the services through HKG3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 19, 7:00 am PST (March 19, 14:00 UTC)

End time is March 19, 2:00 pm PST (March 19, 21:00 UTC)

Update 3/12: Extending Maintenance
Update 3/12: Maintenance Postponed
Update 3/13: Maintenance Rescheduled
Update 3/19: Extending Maintenance
Update 3/19: Maintenance Postponed

Hong Kong III Datacenter Scheduled Maintenance - zscalertwo.net

Tue, 10 Mar 2026 18:11:34 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Hong Kong III (HKG3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 12, 7:00 am PST (March 12, 14:00 UTC)

End time is March 12, 1:00 pm PST (March 12, 20:00 UTC)

Update 3/12: Extended Maintenance

Update - Thu, 12 Mar 2026 20:24:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Washington DC Issue - zscalertwo.net

Tue, 10 Mar 2026 14:38:12 GMT

Zscaler has detected an issue with its Washington DC datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to irregular traffic forwarding behavior.

Latest Update - Tue, 10 Mar 2026 18:06:03 UTC

Update - Tue, 10 Mar 2026 15:17:51 UTC

We have identified the root cause of the issue and working on resolution.

Update - Tue, 10 Mar 2026 18:06:03 UTC

Tianjin Datacenter Issue - zscaler.net

Tue, 10 Mar 2026 13:45:54 GMT

Zscaler has detected an issue with its Tianjin datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Service was restored following a targeted node restart to address a localized resource contention issue.

Update - Tue, 10 Mar 2026 13:31:07 UTC

Mumbai VI Datacenter Scheduled Maintenance - zscalerthree.net

Mon, 09 Mar 2026 23:41:21 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Mumbai VI (BOM6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 11, 10:30 am PST (March 11, 17:30 UTC)

End time is March 11, 4:30 pm PST (March 11, 23:30 UTC)

Update - Thu, 12 Mar 2026 00:12:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Singapore V Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net

Mon, 09 Mar 2026 17:31:11 GMT

Zscaler will be enabling IPv6 at our Singapore V (SIN5) Data Center. During the maintenance window the services through SIN5 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 10, 10:30 am PST (March 10, 17:30 UTC)

End time is March 10, 5:00 pm PST (March 11, 00:00 UTC)

Update 3/10: Extending Maintenance

Update - Tue, 10 Mar 2026 23:59:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Singapore V Datacenter Scheduled Maintenance - zscalerthree.net

Mon, 09 Mar 2026 17:26:02 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Singapore V (SIN5) data center. We expect minimal to no impact to services during the maintenance window.

The new VIPs for Zscaler Extranet Application Support are 167.103.60.134 & 2400:7aa0:2310::3a

Please update your firewall policy rules and any upstream access lists (ACLs) to allow all IP address ranges for this DC.

For more information, please visit:

Maintenance Window:

Start time is March 10, 10:30 am PST (March 10, 17:30 UTC)

End time is March 10, 5:00 pm PST (March 11, 00:00 UTC)

Update 3/10/26: Extending Maintenance
Update 3/9/26: Correcting UTC date + Added ipv6 Extranet VIP

Update - Wed, 11 Mar 2026 00:00:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Brussels II Datacenter Scheduled Maintenance - zscaler.net

Mon, 09 Mar 2026 16:17:46 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Brussels II (BRU2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 11, 10:00 am PST (March 11, 17:00 UTC)

End time is March 11, 6:00 pm PST (March 12, 1:00 UTC)

Update 3/11/26: Extending Maintenance
Update 3/11/26: Extending Maintenance

Update - Wed, 11 Mar 2026 23:41:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Paris IV Datacenter Scheduled Maintenance - zscaler.net

Mon, 09 Mar 2026 15:53:04 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Paris IV (PAR4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 10, 10:00 am PST (March 10, 17:00 UTC)

End time is March 10, 3:00 pm PST (March 10, 22:00 UTC)

Update - Tue, 10 Mar 2026 20:10:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalerthree.net

Sun, 08 Mar 2026 06:04:06 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerthree.net cloud by 1 hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 08 Mar 2026 06:54:21 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscloud.net

Sun, 08 Mar 2026 05:50:19 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud by 1 hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 08 Mar 2026 06:01:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Oceania and AMER datacenters for DLP services - zscaler.net

Sat, 07 Mar 2026 21:24:05 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Oceania and AMER datacenters on the zscaler.net cloud. This maintenance is scheduled for Sunday at 1:00 AM Pacific Time on Mar 8, 2026 (Sunday, Mar 8, 2026 9:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to DLP - EDM and IDM functionality during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Mon, 13 Apr 2026 14:22:42 UTC

This activity was completed within the mentioned timeframe. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on APAC and EMEA datacenters for DLP services - zscaler.net

Sat, 07 Mar 2026 21:12:20 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the APAC and EMEA datacenters on the zscaler.net cloud. This maintenance is scheduled for Saturday at 2:00 PM Pacific Time on Mar 7, 2026 (Saturday, Mar 7, 2026 10:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to DLP - EDM and IDM functionality during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 07 Mar 2026 23:48:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalertwo.net

Sat, 07 Mar 2026 06:23:22 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 07 Mar 2026 07:46:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Cloud Connector Repo Update - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sat, 07 Mar 2026 02:17:49 GMT

Zscaler operations will be performing a planned Software repository update (version 1.146.5_6.2.51633) for the Cloud Connectors on March 7th, 2026 between 9 AM PST to 11 AM PST (March 7th, 2026 between 17:00 to 19:00 UTC). To minimize disruption, we will be rolling out these changes gradually to all customers in 2-3 weeks. The service upgrade will deploy in accordance with the customer configured upgrade schedule. Workloads may experience a brief connection interruption. Customers should ensure that services are configured with recommended high availability to minimize traffic disruptions.

Update - Sun, 08 Mar 2026 22:58:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Kuala Lumpur II Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 06 Mar 2026 17:55:52 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Kuala Lumpur II (KUL2) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on March 9, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update - Mon, 09 Mar 2026 20:37:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Improved Input Validation for User-Editable Text Fields - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net

Fri, 06 Mar 2026 00:00:00 GMT

We’ve enhanced validation for certain user-editable fields to ensure user-provided values remain plain text and render consistently across the UI (including tables, tooltips, and logs).

What Changed

ZIA now enforces stricter validation on specific text fields to prevent the use of:

HTML / markup
HTML-encoded markup / HTML entities (including entity-based representations of special characters or whitespace)

If disallowed input is detected, the API will reject the request with HTTP 400 (Bad Request).

Impacted Areas (where this validation applies)

Impacted Areas	KB Document
Webhook names	https://help.zscaler.com/zia/adding-webhook
PAC file names & descriptions	https://help.zscaler.com/zia/about-hosted-pac-files
Static IP descriptions	https://help.zscaler.com/zia/self-provisioning-static-ip-addresses
URLs in URL categories	https://help.zscaler.com/zia/configuring-custom-url-categories
Extranet names	https://help.zscaler.com/zia/configuring-extranet
Location group names	https://help.zscaler.com/zia/configuring-dynamic-location-groups

What Is Not Allowed (Rejected with HTTP 400)

HTML / Markup in Input Fields Examples (NOT allowed):
- poc<a href="...">X</a>
- <script>alert(1)</script>
- <img src=x onerror=alert(1)>
- <svg onload=alert(1)>
HTML-Encoded Markup / HTML Entities Examples (NOT allowed):
- < , > (encoded < and >)
- &Tab; (encoded tab)
- poc<a href=javascript:confirm(document.domain)>X</a>

What Is Allowed

Plain text values that do not contain HTML markup or HTML entity encodings.

Example (allowed):

Webhook for audit notifications - test environment

Expected Behavior / User Impact

Requests containing disallowed content are rejected with HTTP 400 (Bad Request).
The object will not be created/updated with the invalid value.
This ensures user-provided values render predictably in UI locations such as tables, tooltips, and audit logs.

Implementation Timeline

Starting from 15 March, we will begin the update rollout process.
The rollout will be performed cloud-by-cloud (each production cloud will be updated one by one).
By 31 March, the update is expected to be deployed across all production clouds.

Summary

As part of a product hardening enhancement, the API now rejects inputs containing HTML markup or HTML entity-encoded markup in select user-editable fields (e.g., webhook names, PAC file metadata, URL category URLs, and naming/description fields). Requests with such values will return HTTP 400.

For any further information, please feel free to reach out to the Zscaler Support team.

Degradation in DLP functionality - zscalertwo.net

Fri, 06 Mar 2026 05:36:16 GMT

Zscaler has detected an issue with its DLP - EDM and IDM functionality on the zscalertwo.net Cloud. A subset of customers in the AMER region may experience partial disruption of DLP - EDM and IDM functionality, along with performance degradation due to increased latency in the DLP inspection flow.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: A software defect affecting components of the Data Loss Prevention (DLP) EDM and IDM inspection services caused intermittent disruption and increased processing latency for a subset of customers in the AMER region.

Latest Update - Sat, 07 Mar 2026 00:24:23 UTC

The fix has been implemented and the service has remained stable during monitoring. We are proceeding to resolve this incident.

Update - Fri, 06 Mar 2026 12:52:57 UTC

The Zscaler team has identified the issue as being related to specific software build . Zscaler teams are actively prioritizing the incident, exploring various mitigation options, and working to restore service for all affected traffic.

Update - Fri, 06 Mar 2026 18:14:02 UTC

Zscaler has developed and validated a fix for the issue. Deployment of the update is currently being scheduled, after which the service will be validated to confirm stability. Further updates will be provided once deployment is complete or if there are any significant changes.

Update - Sat, 07 Mar 2026 00:24:23 UTC

The fix has been implemented and the service has remained stable during monitoring. We are proceeding to resolve this incident.

Scheduled Maintenance Extended - EMEA Region - zscloud.net

Thu, 05 Mar 2026 22:50:47 GMT

Update - Wed, 11 Mar 2026 18:10:01 UTC

This activity was completed within the extended maintenance window. Please contact Zscaler Support if you have additional questions.

Vienna I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net

Thu, 05 Mar 2026 21:28:25 GMT

Zscaler will be enabling IPv6 at our Vienna I (VIE1) Data Center. During the maintenance window the services through VIE1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is March 9, 1:00 pm PST (March 9, 20:00 UTC)

End time is March 9, 7:00 pm PST (March 10, 2:00 UTC)

Update - Tue, 10 Mar 2026 00:56:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Washington DC IV Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 05 Mar 2026 16:20:05 GMT

Zscaler has detected an issue with its Washington DC IV datacenter and is currently investigating the matter. Some customers may encounter difficulties with DNS resolution. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The incident occurred due to a synchronization issue on a subset of Zscaler's DNS resolvers.

Latest Update - Thu, 05 Mar 2026 19:41:11 UTC

Following successful remediation, DNS services have returned to normal. Our teams continue to monitor all systems to ongoing stability.

Update - Thu, 05 Mar 2026 16:44:12 UTC

We have identified the root cause of the issue and working on resolution.

Update - Thu, 05 Mar 2026 18:17:25 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Thu, 05 Mar 2026 19:41:11 UTC

Following successful remediation, DNS services have returned to normal. Our teams continue to monitor all systems to ongoing stability.

Upcoming New Data Centers and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Wed, 04 Mar 2026 00:12:17 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on March 3, 2026, we would like to notify you of the upcoming new data centers and expansions at the locations listed below. These would be available anytime on or after May 2, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Bogota II	205.220.57.0/24	New RS* data center
Americas	Bogota II	205.220.68.0/24	New RS* data center
APAC	Chennai II	205.220.122.0/23	Expansion of existing data center
APAC	Chennai II	205.220.124.0/23	Expansion of existing data center
APAC	Chennai II	205.220.126.0/23	Expansion of existing data center
APAC	Hong Kong IV	175.107.170.0/23	New data center
APAC	Hong Kong IV	175.107.172.0/23	New data center
APAC	Hong Kong IV	175.107.174.0/23	New data center
APAC	Hong Kong IV	175.107.176.0/23	New data center
APAC	Hong Kong IV	175.107.178.0/23	New data center
APAC	Hong Kong IV	2400:7aa0:2e00::/40	New data center
APAC	Hyderabad I	101.2.252.0/23	Expansion of existing data center
APAC	Hyderabad I	101.2.254.0/23	Expansion of existing data center
APAC	Jakarta I	162.128.187.0/24	New RS* data center
APAC	Shanghai II	116.196.192.0/24	Expansion of existing data center
EMEA	Abu Dhabi II	159.254.242.0/23	New data center
EMEA	Abu Dhabi II	159.254.244.0/23	New data center
EMEA	Abu Dhabi II	159.254.246.0/23	New data center
EMEA	Abu Dhabi II	159.254.248.0/23	New data center
EMEA	Abu Dhabi II	159.254.250.0/23	New data center
EMEA	Abu Dhabi II	2a03:eec0:3900::/40	New data center
EMEA	Abu Dhabi II	147.161.174.0/23	Allocation removed from this data center
EMEA	London III	170.85.60.0/23	Expansion of existing data center
EMEA	London V	159.254.222.0/23	Expansion of existing data center
EMEA	London V	159.254.224.0/23	Expansion of existing data center
EMEA	Frankfurt IV	159.254.226.0/23	Expansion of existing data center
EMEA	Frankfurt IV	159.254.228.0/23	Expansion of existing data center
EMEA	Frankfurt IV	159.254.230.0/23	Expansion of existing data center
EMEA	Frankfurt VI	159.254.232.0/23	Expansion of existing data center
EMEA	Frankfurt VI	159.254.234.0/23	Expansion of existing data center
EMEA	Manchester I	159.254.236.0/23	Expansion of existing data center
EMEA	Manchester I	159.254.238.0/23	Expansion of existing data center
EMEA	Marseille I	159.254.252.0/23	Expansion of existing data center

*RS - Regional Surcharge (An additional subscription is required in order to use these data centers)

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Mumbai VI Datacenter Scheduled Maintenance - zscaler.net

Mon, 02 Mar 2026 23:06:51 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 6, 10:00 am PST (March 6, 18:00 UTC)

End time is March 6, 2:00 pm PST (March 6, 22:00 UTC)

Update - Fri, 06 Mar 2026 22:28:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 02 Mar 2026 21:04:20 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on January 16, 2026, we would like to remind you of the upcoming data center expansions at the locations listed below. These would be effective anytime on or after March 17, 2026.

Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
APAC	Hong Kong III	101.2.242.0/23	Expansion of existing DC
EMEA	Helsinki I	159.254.210.0/23	Expansion of existing DC
EMEA	Munich I	159.254.212.0/22	Expansion of existing DC
EMEA	Stockholm III	165.225.238.0/23	Expansion of existing DC

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

VPN Legacy Application Issue - private.zscaler.com

Mon, 02 Mar 2026 00:00:00 GMT

Zscaler continues to monitor the previously reported service disruption impacting private.zscaler.com, affecting access to VPN Legacy Applications for a subset of users.

Initial telemetry and early recovery indicators suggested that service behavior had stabilized; however, subsequent monitoring has confirmed that intermittent impact remains for a subset of users. According to the cloud provider’s status page, two Availability Zones (mec1-az2 and mec1-az3) in the AWS ME-CENTRAL-1 Region are currently experiencing impairment, and AWS is actively working toward full restoration.

Customers may refer to the cloud provider’s status page for additional updates related to the underlying infrastructure Status Page.

Zscaler continues close monitoring of the situation and will provide further updates as additional information becomes available or once full service stability is confirmed. Customers requiring assistance or continuing to experience impact are encouraged to contact Zscaler Support for further investigation and guidance.

Brussels II Datacenter Issue - zscaler.net, zscloud.net

Mon, 02 Mar 2026 06:32:45 GMT

Zscaler has detected an issue with our Brussels II datacenter on the zscaler.net and the zscloud.net clouds, and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: The issue was caused by a hardware fault impacting a network device within the infrastructure.

Latest Update - Mon, 16 Mar 2026 22:50:13 UTC

The impacted network hardware has been replaced. Validation checks confirmed that the infrastructure is operating normally and service health has been restored. The incident has been resolved, and normal service operations have resumed.

Update - Mon, 02 Mar 2026 10:55:35 UTC

The Zscaler team has identified the issue as being related to faulty hardware. Zscaler teams are actively prioritizing the incident, exploring various mitigation options, and working to restore service for all affected traffic.

Update - Mon, 02 Mar 2026 14:28:32 UTC

Zscaler is coordinating closely with the data center team to replace the faulty hardware. We expect shipment and deployment to be completed within 2–3 days and will provide a follow-up once the replacement is completed.

Update - Fri, 06 Mar 2026 02:44:22 UTC

As per the latest confirmation from the data center team, the replacement hardware is expected to arrive by 10th March, 2026. We will share more updates as available.

Update - Tue, 10 Mar 2026 04:16:42 UTC

As per the latest confirmation from the data center team, the replacement hardware is now expected to arrive by 13th March,2026. We will continue to monitor the situation closely and will share further updates as they become available.

Update - Fri, 13 Mar 2026 09:20:16 UTC

Zscaler has received an update from the courier confirming that the replacement hardware has cleared customs and is pending arrival at the delivery destination. We will continue to monitor the situation closely and will provide further updates as they become available.

Update - Mon, 16 Mar 2026 04:31:48 UTC

Zscaler is following up with the data center team to check the latest status of the shipment and further updates will be shared when available.

Update - Mon, 16 Mar 2026 13:08:40 UTC

The replacement hardware has arrived onsite, Zscaler teams are currently working on the swap. We’ll share a further update once the switch replacement is complete.

Update - Mon, 16 Mar 2026 22:50:13 UTC

Cloud Browser Isolation service impacted in Middle East (UAE) - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sun, 01 Mar 2026 17:37:09 GMT

Zscaler has identified an issue with Cloud Browser Isolation (CBI) impacting customers in Middle East (UAE). Affected customers may experience difficulties when attempting to create new sessions.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: A disruption to AWS infrastructure services in the UAE region temporarily impacted the availability of the Cloud Browser Isolation (CBI) service hosted in that region.

Latest Update - Thu, 05 Mar 2026 23:05:47 UTC

Zscaler has redirected Cloud Browser Isolation (CBI) traffic to alternate operational regions, and the service is currently operating normally. Users configured to use the UAE isolation region may temporarily be served from a secondary configured region. Once infrastructure services in the UAE region are fully restored, traffic will automatically and seamlessly transition back.

Update - Sun, 01 Mar 2026 18:41:26 UTC

Initial findings indicate that this issue is related to an AWS service issue within Availability Zone mec1-az2 in the ME-CENTRAL-1 region. Until their services are restored the customers can chose to change the regions selection in Admin Portal within each Isolation profile. Please refer the help guide

Update - Sun, 01 Mar 2026 23:35:43 UTC

Zscaler is seeing positive signs of recovery for Cloud Browser Isolation (CBI) following AWS mitigation of underlying EC2 API issues. Success rates for session creation have significantly improved, and customers can now successfully initiate new CBI sessions. We continue to monitor the environment to ensure full stability.

Update - Mon, 02 Mar 2026 04:53:33 UTC

Following the actions taken by AWS to mitigate the issue, this incident is now resolved.

Update - Mon, 02 Mar 2026 07:33:54 UTC

The issue is still ongoing and we are investigating the same. Further updates will be shared as available.

Update - Mon, 02 Mar 2026 12:42:24 UTC

AWS continues to report a service health issue in Availability Zone mec1-az2 within the ME-CENTRAL-1 region. Until services are restored, customers can change the region selection in the Admin Portal for each Isolation profile. Please refer to the help guide shared in the workaround field.

Update - Mon, 02 Mar 2026 15:06:16 UTC

Zscaler has proactively disabled the ME-CENTRAL-1 region following significant infrastructure impairments within AWS Availability Zones mec1-az2 and mec1-az3. While traffic is automatically rerouting to secondary regions, AWS reports that facility recovery including repairs to power and cooling systems will take at least 24 hours.

Update - Tue, 03 Mar 2026 14:08:04 UTC

Zscaler has redirected traffic from the ME-CENTRAL-1 (UAE) region to users' secondary isolation regions due to AWS issues. We will restore normal routing to the UAE region once AWS resolves the underlying incident at their facility.

Update - Wed, 04 Mar 2026 19:11:35 UTC

Following the successful redirection of traffic, no further issues related to the Cloud Browser Isolation (CBI) service have been identified. We remain in a monitoring period to ensure continued service stability and performance.

Update - Thu, 05 Mar 2026 23:05:47 UTC

VPN Legacy Application Issue - private.zscaler.com

Sun, 01 Mar 2026 00:00:00 GMT

Zscaler is currently investigating an issue affecting Legacy VPN application services for customers in the UAE region. Initial findings indicate that this disruption is related to an AWS service issue within Availability Zone mec1-az2 in the ME-CENTRAL-1 region.

Our operations team is monitoring the situation closely and working toward mitigation. We will provide further updates as more information becomes available.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Mon, 02 Mar 2026 02:47:13 UTC

The AWS service disruption has recovered, and Zscaler is considering this issue resolved.

Update - Sun, 01 Mar 2026 17:23:03 UTC

An issue within AWS was identified, and Zscaler teams are actively working to address and mitigate the problem.

Update - Mon, 02 Mar 2026 02:47:13 UTC

The AWS service disruption has recovered, and Zscaler is considering this issue resolved.

Scheduled Maintenance Extended - zscloud.net

Sun, 01 Mar 2026 05:27:53 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 01 Mar 2026 07:07:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Middle East Situation and Elevated Monitoring Posture - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Sat, 28 Feb 2026 00:00:00 GMT

Zscaler is aware of ongoing geopolitical developments in the Middle East that may impact regional internet connectivity and routing. As part of our standard operational practices, Zscaler is closely monitoring global network conditions and internet infrastructure stability to help maintain continued service reliability for our customers.

As of February 28, 2026, Zscaler services are operating normally, and we have not observed any impact to platform availability, performance, or security services.

Zscaler continuously monitors external factors that may influence internet routing, regional connectivity, and cybersecurity risk levels. In light of current conditions, we have increased operational monitoring and readiness measures across our global cloud infrastructure as a precautionary step to support service resilience.

Current Service Status

All Zscaler services are operating normally.
As of February 28, 2026, no disruption has been observed Traffic processing, policy enforcement, and security inspection capabilities are functioning as expected.

Operational Readiness

Zscaler operates a globally distributed cloud platform designed for high availability and continuity. Our operational teams are:

Monitoring global internet health, routing stability, and infrastructure conditions
Monitoring cybersecurity threat activity and indicators relevant to customer environments
Prepared to take proactive mitigation actions, if required, to maintain service stability and protection

Customer Guidance

No customer action is required at this time.
Customers may continue normal operations. Zscaler will update this advisory on this page and through official communication channels should any service impact occur or additional guidance become necessary.

Urgent Maintenance - zscalerone.net

Sat, 28 Feb 2026 20:34:53 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the zscalerone.net cloud. This maintenance is scheduled for Sunday at 1:00 AM Pacific Time on March 1, 2026 (Sunday, March 1, 2026 9:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Capetown, Capetown IV, Johannesburg II, Johannesburg III, Lagos, London III, and New York III datacenters - zscalerone.net

Sat, 28 Feb 2026 20:27:07 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Capetown, Capetown IV, Johannesburg II, Johannesburg III, Lagos, London III, and New York III datacenters on the zscalerone.net cloud. This maintenance is scheduled for Saturday at 2:00 PM Pacific Time on February 28, 2026 (Saturday, February 28, 2026 10:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 28 Feb 2026 23:53:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Beijing III, Shanghai Datacenter Issue - zscaler.net

Sat, 28 Feb 2026 13:53:30 GMT

Zscaler has detected an issue with our Beijing III, Shanghai datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: An external network connectivity issue affecting international internet paths caused certain services in our China data centers to be temporarily identified as unavailable.

Latest Update - Sat, 28 Feb 2026 16:29:11 UTC

Based on telemetry and ongoing monitoring, services have remained stable following the corrective actions implemented. As a result, this incident is now being resolved.

Update - Sat, 28 Feb 2026 14:14:41 UTC

We have identified the root cause of the issue and working on resolution.

Update - Sat, 28 Feb 2026 14:29:25 UTC

Zscaler has identified the cause of the issue and implemented corrective actions to mitigate the impact. Services have stabilized, and monitoring remains in place to ensure continued stability.

Update - Sat, 28 Feb 2026 16:29:11 UTC

Based on telemetry and ongoing monitoring, services have remained stable following the corrective actions implemented. As a result, this incident is now being resolved.

Connectivity Issues Affecting India Data Centers - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Sat, 28 Feb 2026 10:19:57 GMT

Zscaler has detected an issue with its Chennai II, Hyderabad I, Kolkata I, Mumbai VI, Mumbai VII, New Delhi I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The incident was caused by upstream international network congestion correlated with ongoing remediation activities on the Europe India Gateway (EIG) submarine cable system, external to Zscaler infrastructure.

Latest Update - Mon, 02 Mar 2026 18:16:29 UTC

Over the past 48 hours, upstream network conditions have remained stable, and continued monitoring and validation confirm that Zscaler services are operating normally with performance within expected levels across affected regions. Based on sustained service stability, this incident is now considered resolved.

Update - Sat, 28 Feb 2026 12:23:37 UTC

Zscaler has identified a connectivity disruption affecting multiple India data centers. The issue is due to upstream international network congestion linked to transcontinental fiber impairments. Customers may experience increased latency, slowness, and degraded performance when accessing US- and Europe-hosted destinations via ZIA and ZPA. For immediate resolution we suggest to divert traffic to an alternate DC.

Update - Sat, 28 Feb 2026 15:07:40 UTC

Zscaler has observed that network connectivity has stabilized and services are fully reachable. Continued validation and monitoring confirm that performance is operating within expected levels. The disruption was associated with prolonged subsea cable issues impacting international network paths, resulting in transient connectivity loss between regions. Zscaler teams will continue investigating upstream network paths and may engage with relevant partners as needed to further isolate contributing factors. At this time, services remain stable, and enhanced monitoring is in place to ensure continued reliability.

Update - Sat, 28 Feb 2026 19:27:38 UTC

Zscaler conducted further investigation and collaborated with a telecom partner to review upstream international network conditions affecting connectivity. Based on this analysis, the observed disruption was correlated with ongoing remediation activities associated with the Europe India Gateway (EIG) submarine cable system, which contributed to periodic congestion, increased latency, and packet loss between India and regions including the US and Europe.

If you continue to observe periodic congestion, latency, or packet loss affecting specific services or applications, please contact Zscaler Support and reference the impacted service or application along with relevant details. Zscaler teams will evaluate traffic paths and perform path optimization where applicable. Services remain stable, and monitoring continues to ensure ongoing reliability.

Update - Sun, 01 Mar 2026 19:40:53 UTC

Zscaler continues to monitor international network conditions impacting connectivity between India data centers and destinations hosted in the US and Europe. Services remain stable and reachable, and current performance is operating within expected levels. Our investigation and partner engagement indicate the prior intermittent congestion, elevated latency, and packet loss were associated with upstream remediation activities on the Europe India Gateway (EIG) submarine cable system. Zscaler has implemented enhanced monitoring and is continuing to evaluate routing and traffic paths for additional optimization opportunities where applicable. Customers who continue to observe periodic latency, slowness, or packet loss for specific applications should contact Zscaler Support and provide the affected application/service, the impacted source/destination regions, timestamps, and any traceroute/packet-loss evidence to assist with path analysis.

Update - Mon, 02 Mar 2026 18:16:29 UTC

Scheduled Maintenance Extended - zscaler.net

Sat, 28 Feb 2026 05:27:52 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscaler.net cloud by 4 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Latest Update - Sat, 28 Feb 2026 11:27:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 28 Feb 2026 09:15:38 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscaler.net cloud by 3 hours.

Update - Sat, 28 Feb 2026 11:27:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Osaka I Datacenter Scheduled Maintenance - zscaler.net, zscalerthree.net

Sat, 28 Feb 2026 01:56:13 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Osaka I (OSA1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 4, 9:00 am PST (March 4, 17:00 UTC)

End time is March 4, 3:00 pm PST (March 4, 23:00 UTC)

Update 3/3/26: Corrected UTC date & time
Update 3/4/26: Extending Maintenance

Update - Thu, 05 Mar 2026 02:04:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Denver III Datacenter Scheduled Maintenance - zscalertwo.net

Sat, 28 Feb 2026 01:26:21 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Denver III (DEN3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 3, 5:00 pm PST (March 4, 1:00 UTC)

End time is March 3, 11:00 pm PST (March 4, 7:00 UTC)

Update - Wed, 04 Mar 2026 06:44:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vienna I Datacenter Scheduled Maintenance - zscaler.net, zscalerthree.net

Fri, 27 Feb 2026 22:11:22 GMT

Zscaler will be performing planned maintenance at our Vienna I (VIE1) Data Center.
We expect minimal to no impact to services during the maintenance window.

Maintenance Window:
Start time is March 3, 12:00 pm PST (March 3, 20:00 UTC)
End time is March 3, 5:00 pm PST (March 4, 1:00 UTC)

Update - Tue, 03 Mar 2026 21:29:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Connectivity Issues Affecting India Data Centers - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Fri, 27 Feb 2026 21:14:21 GMT

Zscaler has detected an issue with our Chennai II, Hyderabad I, Kolkata I, Mumbai VI, Mumbai VII, New Delhi I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The incident was caused by upstream international network congestion related to transcontinental fiber issues external to Zscaler infrastructure.

Latest Update - Sat, 28 Feb 2026 00:52:38 UTC

Continued monitoring and validation confirm that services are operating at expected levels. We are proceeding to resolve this incident.

Update - Fri, 27 Feb 2026 21:41:08 UTC

Zscaler investigated the connectivity disruption and determined the issue was caused by upstream international network congestion associated with transcontinental fiber issues. The impact occurred between 19:50 and 21:00 UTC. Services have since recovered, and Zscaler is currently operating normally. We will continue to monitor service stability to ensure ongoing performance.

Update - Sat, 28 Feb 2026 00:52:38 UTC

Continued monitoring and validation confirm that services are operating at expected levels. We are proceeding to resolve this incident.

Tianjin Datacenter Issue - zscalertwo.net

Fri, 27 Feb 2026 05:45:08 GMT

Root Cause: The issue was caused by a brief interruption to an IPSec traffic processing component within the data center.

Update - Fri, 27 Feb 2026 05:40:43 UTC

The issue recovered without any manual intervention from Zscaler, and the incident has been resolved.

Sao Paulo II Datacenter Issue - zscloud.net

Fri, 27 Feb 2026 03:54:02 GMT

Root Cause: Root cause of the issue is attributed to a IPSEC traffic processing component being down in the data center.

Update - Fri, 27 Feb 2026 04:03:24 UTC

Following the actions taken by Zscaler, the incident has been resolved.

Brussels (BRU2) Datacenter Network Maintenance - zscaler.net, zscloud.net

Fri, 27 Feb 2026 02:08:36 GMT

Zscaler will be performing hardware maintenance in the Brussels II (BRU2) Datacenter.

Maintenance window,
Start: 2026-03-02 03:00 UTC
End: 2026-03-02 05:00 UTC
(2026-03-02 04:00 - 2026-03-02 06:00 Local time)

Update - Mon, 02 Mar 2026 05:29:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester II Datacenter Scheduled Maintenance - zscaler.net, zscloud.net

Thu, 26 Feb 2026 21:41:49 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester II (MAN2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 2, 10:00 am PST (March 2, 18:00 UTC)

End time is March 2, 4:00 pm PST (March 3, 00:00 UTC)

Update - Mon, 02 Mar 2026 23:39:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalerone.net

Thu, 26 Feb 2026 20:26:05 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 12:00 AM Pacific Time on February 27, 2026 (Friday, February 27, 2026 8:00 AM UTC), and can take up to 4 hours to complete.

Latest Update - Fri, 27 Feb 2026 13:43:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 27 Feb 2026 11:55:48 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerone.net cloud by 2 hours.

Update - Fri, 27 Feb 2026 13:43:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II (CHI2), San Francisco IV (SJC4) and Los Angeles II (QLA2) Datacenter Issue - zscaler.net, zscalertwo.net

Thu, 26 Feb 2026 17:33:35 GMT

Zscaler is aware of a issue with its Chicago II datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue was caused by a configuration error introduced during a recent infrastructure optimization change, which impacted traffic processing on a limited subset of service nodes and resulted in increased latency for affected customers.

Latest Update - Fri, 27 Feb 2026 23:46:18 UTC

Based on our telemetry and monitoring, service performance has remained stable. Following the corrective actions implemented by Zscaler, the incident has been resolved. All systems are operating normally.

Update - Thu, 26 Feb 2026 18:16:11 UTC

We have identified the root cause of the issue and working on resolution.

Update - Thu, 26 Feb 2026 18:35:58 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Thu, 26 Feb 2026 23:33:37 UTC

Mitigation measures implemented in the Chicago II (CHI2) data center within the zscalertwo.net cloud continue to remain effective, and we have received positive customer feedback confirming service stability. During continued analysis, a similar anomaly was identified in the San Francisco IV (SJC4) data center within the zscalertwo.net cloud and the Los Angeles II (QLA2) data center within the zscaler.net cloud. Zscaler has applied the necessary fix in these locations, and the service is operating normally. We continue to monitor closely to ensure sustained stability and will provide further updates based on ongoing system observations and customer feedback.

Update - Fri, 27 Feb 2026 23:46:18 UTC

Urgent Maintenance on Los Angeles II datacenter. - zscaler.net

Thu, 26 Feb 2026 06:13:19 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Los Angeles II on the zscaler.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 26 Feb 2026 09:12:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Chicago II, San Francisco IV datacenters. - zscalertwo.net

Thu, 26 Feb 2026 06:08:52 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Chicago II, San Francisco IV on the zscalertwo.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 26 Feb 2026 09:12:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai II Datacenter Scheduled Maintenance - zscaler.net

Thu, 26 Feb 2026 00:45:32 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chennai II (MAA2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is March 2, 9:00 am PST (March 2,, 17:00 UTC)

End time is March 2,, 2:00 pm PST (March 2,, 22:00 UTC)

Update 2/26: Maintenance Date Update

Update - Mon, 02 Mar 2026 22:09:36 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Client Connector for VDI – Version 1.7 Upgrade Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 25 Feb 2026 00:00:00 GMT

Zscaler is investigating an issue affecting customers who upgraded the Zscaler Client Connector for Virtual Desktop Infrastructure (VDI) to versions 1.7.0.4, 1.7.0.6, or 1.7.0.7.

Following the upgrade, some VDI instances may remain in an “off” state due to authentication failures. As a result, impacted VDIs may be unable to establish a connection to the Zscaler service.

Zscaler has identified the issue and validated that reverting to version 1.6 restores expected functionality. A permanent fix is currently under validation.

Who is impacted?

You may be impacted if:

You are using Zscaler Client Connector (ZCC) for VDI
You upgraded to version 1.7.0.4, 1.7.0.6, or 1.7.0.7
Your VDI instances are showing an “off” state and failing authentication

Customers who remain on version 1.6 or lower are not impacted.

What are my next steps?

If you have upgraded to version 1.7.0.4, 1.7.0.6, or 1.7.0.7:

Downgrade Zscaler Client Connector for VDI to version 1.6
Validate that the Client Connector Service Status is “ON”

This downgrade has been validated as a stable interim mitigation. We recommend pausing any additional rollouts of version 1.7 until further notice.

What if I have more questions?

If you require assistance with the rollback process or need further clarification, please contact Support.

Update - Wed, 11 Mar 2026 23:03:48 UTC

Zscaler has released Zscaler Client Connector for VDI version 1.7.0.10, which includes the fix for the reported issue. By end of day, the 1.7.0.10 image will be made available in the Client Connector App Store within the Client Connector UI, allowing customers to download and deploy the updated image directly. Customers experiencing this issue are advised to upgrade to this version once it becomes available.

San Francisco IV (SJC4) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 25 Feb 2026 02:50:19 GMT

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
Start: 2026-02-27 02:00 UTC
End: 2026-02-27 04:00 UTC
(Local Time 2026-02-26 18:00 - 2026-02-26 20:00)

Update - Mon, 02 Mar 2026 14:30:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Client Connector Enrollment Failures - zscalertwo.net

Tue, 24 Feb 2026 22:34:57 GMT

Zscaler is aware of an issue impacting Zscaler Client Connector (ZCC) enrollment, where some users may encounter the error: "Zscaler Client Connector was unable to enroll at this time."

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: A temporary service condition within the Zscaler control plane enrollment service resulted in intermittent delays for Zscaler Client Connector (ZCC) new device enrollment and sign-in requests during the impact window. A detailed Root Cause Analysis (RCA) will be shared once the review is complete.

Latest Update - Wed, 25 Feb 2026 00:35:41 UTC

Further monitoring has confirmed stable service performance, and the incident is now resolved.

Update - Tue, 24 Feb 2026 23:19:41 UTC

During the course of our investigation, the issue self-resolved without manual intervention. Zscaler teams have continued to monitor the environment and have observed stable system performance. Further analysis is ongoing to validate the underlying cause and preventative measures. We will provide additional updates as appropriate.

Update - Wed, 25 Feb 2026 00:35:41 UTC

Further monitoring has confirmed stable service performance, and the incident is now resolved.

Tel Aviv II (TLV2) Datacenter Network Maintenance - zscloud.net

Tue, 24 Feb 2026 21:58:44 GMT

Zscaler will be performing urgent hardware maintenance in the Tel Aviv II (TLV2) Datacenter.

Maintenance window,
Start: 2026-27-2 21:00 IST
End: 2026-27-2 23:00 IST
(i.e. 2026-27-2 19:00 - 21:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 27 Feb 2026 20:25:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Endpoint Data Loss Prevention (DLP) Service Issues - zscaler.net, zscloud.net, zscalerthree.net

Tue, 24 Feb 2026 13:55:39 GMT

Zscaler has identified an issue with the Endpoint Data Loss Prevention (DLP) and incident logging services on the zscaler.net, zscloud.net, zscalerthree.net Cloud. As a result, some customers may experience issues with enforcing new policies. However, please note that existing policies are still being enforced as expected. The impact is limited to some customers.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A known software defect caused the Endpoint DLP Gateway (EDPG) process to repeatedly crash and be restarted across multiple clouds.

Latest Update - Thu, 26 Feb 2026 03:36:14 UTC

Zscaler has completed the cloud-wide deployment of the fix across all remaining EDPG instances as of 01:00 UTC, 26 Feb. The issue is resolved and services are operating normally.

Update - Tue, 24 Feb 2026 16:00:46 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Tue, 24 Feb 2026 19:34:20 UTC

Zscaler teams continue working on this issue with priority. Further updates will be shared when available.

Update - Wed, 25 Feb 2026 05:44:12 UTC

Zscaler has developed a fix and is deploying it cloud-wide in a phased manner, and it is expected to be complete by 01:00 UTC, 26 Feb.

Update - Thu, 26 Feb 2026 03:36:14 UTC

Zscaler has completed the cloud-wide deployment of the fix across all remaining EDPG instances as of 01:00 UTC, 26 Feb. The issue is resolved and services are operating normally.

Vienna I Datacenter Scheduled Maintenance - zscloud.net

Tue, 24 Feb 2026 00:30:57 GMT

Zscaler will be performing planned maintenance at our Vienna I (VIE1) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 26, 12:00 pm PST (February 26, 20:00 UTC)

End time is February 26, 7:00 pm PST (February 27, 3:00 UTC)

Update 2/26: Extended Maintenance

Update - Fri, 27 Feb 2026 02:46:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Melbourne II Datacenter Scheduled Maintenance - zscalerthree.net

Mon, 23 Feb 2026 21:19:41 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Melbourne II (MEL2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 25, 6:00 am PST (February 25, 14:00 UTC)

End time is February 25, 11:00 am PST (February 25, 19:00 UTC)

Update - Wed, 25 Feb 2026 18:06:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Plus Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 23 Feb 2026 17:59:09 GMT

Beijing V DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within this data center may experience intermittent disconnections.

Start Time: 2026-03-20 16:00:00 UTC
End Time: 2026-03-20 20:00:00 UTC
(Datacenter Local Time 2026-03-21 00:00 - 2026-03-21 04:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 20 Mar 2026 21:35:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo V (TYO5) Datacenter Network Maintenance - zscalerthree.net

Mon, 23 Feb 2026 10:05:34 GMT

Zscaler will be performing hardware maintenance in Tokyo V (TYO5) Datacenter.

Scheduled Maintenance window,
Start: 2026-02-24 15:00 UTC
End: 2026-02-24 19:00 UTC
(Local Time 2026-02-25 00:00 - 2026-02-25 04:00 JST)

Update - Tue, 24 Feb 2026 16:49:23 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hyderabad I Datacenter Scheduled Maintenance - zscalertwo.net

Sat, 21 Feb 2026 05:35:19 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Hyderabad I (HYD1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 24, 9:00 am PST (February 24, 17:00 UTC)

End time is February 24, 4:00 pm PST (February 25, 00:00 UTC)

Update - Wed, 25 Feb 2026 00:08:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt VI Datacenter Maintenance - zscaler.net

Fri, 20 Feb 2026 21:39:08 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Frankfurt VI (FRA6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 24, 9:00 am PST (February 24, 17:00 UTC)

End time is February 24, 6:00 pm PST (February 25, 2:00 UTC)

Update 2/24: Maintenance Extended
Update 2/24: Maintenance Extended

Update - Wed, 25 Feb 2026 01:55:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Beijing IV, Beijing V, Shanghai VI Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 20 Feb 2026 13:34:21 GMT

Zscaler has detected an issue with our Beijing IV, Beijing V, Shanghai VI datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Upstream provider experienced an congestion.

Latest Update - Fri, 20 Feb 2026 19:01:21 UTC

Update - Fri, 20 Feb 2026 13:55:07 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Fri, 20 Feb 2026 15:13:12 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Fri, 20 Feb 2026 19:01:21 UTC

Beijing Datacenter Issue - zscaler.net, zscloud.net, zscalerthree.net

Fri, 20 Feb 2026 13:24:07 GMT

Zscaler has detected an issue with its Beijing datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The incident occurred due to congestion on a third-party carrier’s international backbone.

Latest Update - Fri, 20 Feb 2026 20:30:07 UTC

Update - Fri, 20 Feb 2026 13:57:39 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Fri, 20 Feb 2026 15:12:32 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Fri, 20 Feb 2026 20:30:07 UTC

Emergency Rio de Janeiro I (RIO1) Datacenter Network Maintenance - zscaler.net

Thu, 19 Feb 2026 20:09:20 GMT

Zscaler will be performing Emergency hardware maintenance in the Rio de Janeiro I (RIO1) Datacenter.

Maintenance window,
Start: 2026-19-2 19:00 GMT-3
End: 2026-19-2 21:00 GMT-3
(i.e. 2026-19-2 22:00 - 2026-19-2 00:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 19 Feb 2026 22:46:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Plus Datacenters (Beijing V & Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 19 Feb 2026 00:44:33 GMT

Beijing V & Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within these data centres may experience intermittent disconnections.

Start Time: 2026-02-27 14:00:00 UTC
End Time: 2026-02-27 17:00:00 UTC
(Datacenter Local Time 2026-02-27 22:00 - 2026-02-28 01:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 27 Feb 2026 22:11:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dallas I Datacenter Urgent Maintenance - zscalertwo.net

Wed, 18 Feb 2026 23:02:58 GMT

Zscaler will be expanding its global data center footprint and performing urgent maintenance at our Dallas I (DFW1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 18, 5:00 pm PST (February 19, 1:00 UTC)

End time is February 18, 9:00 pm PST (February 19, 5:00 UTC)

Update - Thu, 19 Feb 2026 05:28:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI Datacenter Scheduled Maintenance - zscalertwo.net

Wed, 18 Feb 2026 22:04:02 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 19, 2:00 pm PST (February 19, 22:00 UTC)

End time is February 19, 6:00 pm PST (February 20, 2:00 UTC)

Update - Thu, 19 Feb 2026 23:59:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New Delhi I Datacenter Scheduled Maintenance - zscalertwo.net

Wed, 18 Feb 2026 20:54:18 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our New Delhi I (DEL1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 20, 10:00 am PST (February 20, 18:00 UTC)

End time is February 20, 3:00 pm PST (February 20, 23:00 UTC)

Update 2/18/26: Rescheduled to new date/time

Update - Fri, 20 Feb 2026 21:05:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Santiago II Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 18 Feb 2026 19:55:26 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler are bringing online a new Santiago II (SCL2) data center. This facility will not be added to the public resolution service (Auto Geo Proximity Disabled).

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update - Wed, 18 Feb 2026 19:54:46 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Kolkata I Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 18 Feb 2026 19:53:34 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Kolkata I (CCU1) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on February 20, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update 2/20: Maintenance rescheduled
Update 2/20: Maintenance extended

Update - Sat, 21 Feb 2026 05:25:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New York IV (NYC4) Datacenter Network Maintenance - zscalerthree.net

Wed, 18 Feb 2026 13:28:20 GMT

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-02-20 00:00 EST
End: 2026-02-20 02:00 EST
(i.e. 2026-02-20 05:00 - 2026-02-20 07:00 UTC)

Update - Fri, 20 Feb 2026 06:46:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI Issue - zscalertwo.net

Wed, 18 Feb 2026 09:18:12 GMT

Zscaler has detected an issue with the administration UI on its zscalertwo.net Cloud. To assist with recovery, the Admin UI has been placed into Read-Only Mode. Your organization's policies are currently being enforced.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Wed, 18 Feb 2026 14:56:50 UTC

Update - Wed, 18 Feb 2026 10:42:50 UTC

Update - Wed, 18 Feb 2026 12:01:45 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Wed, 18 Feb 2026 13:16:34 UTC

Mitigation efforts are ongoing and are in the final stages. Once mitigation is complete, read-only mode will be removed from the Admin UI.

Update - Wed, 18 Feb 2026 13:53:20 UTC

Mitigation actions have been completed, and read-only mode has been removed. The Admin UI is now fully available.

Update - Wed, 18 Feb 2026 14:56:50 UTC

Chicago 1 Datacenter Emergency Maintenance - zscalertwo.net

Wed, 18 Feb 2026 04:29:58 GMT

Zscaler will be expanding its global data center footprint and performing an emergency maintenance at our Chicago1 (CHI1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC.

For more information, please visit:
https://config.zscaler.com/zscalertwo.net/cenr

Maintenance Window:

Start time is February 17, 9:00 pm PST (February 18, 5:00 UTC)

End time is February 18, 12:00 am PST (February 18, 8:00 UTC)

Update - Wed, 18 Feb 2026 06:28:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 17 Feb 2026 19:31:16 GMT

Zscaler will be enabling IPv6 at our Mumbai VI (BOM6) Data Center. During the maintenance window the services through BOM6 Data Center will be restarted in phases to minimize the service impact.

Maintenance Window:

Start time is March 13, 11:30 am PST (March 13, 18:30 UTC)

End time is March 13, 5:30 pm PST (March 14, 00:30 UTC)

Update 2/18/26: Maintenance Extended
Update 2/18/26: Maintenance Postponed - TBA
Update 3/6/26: Maintenance Scheduled & verbiage change

Update - Sat, 14 Mar 2026 00:57:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Device registration issues for Zscaler Client Connector - zscalertwo.net, zscalerthree.net

Tue, 17 Feb 2026 19:44:19 GMT

Zscaler has detected an issue with the Zscaler Client Connector Portal and device registration failure on its zscalertwo.net, zscalerthree.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: The issue was caused by a configuration issue on a limited set of Mobile Admin nodes that temporarily disrupted their connectivity with the Central Authority (CA), resulting in brief Zscaler Client Connector registration failures.

Latest Update - Wed, 18 Feb 2026 00:40:48 UTC

Update - Tue, 17 Feb 2026 19:51:17 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 18 Feb 2026 00:40:48 UTC

New Delhi I Datacenter Scheduled Maintenance - zscaler.net, zscloud.net, zscalerthree.net

Tue, 17 Feb 2026 18:04:44 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 18, 10:00 am PST (February 18, 18:00 UTC)

End time is February 18, 3:00 pm PST (February 18, 23:00 UTC)

Update 2/17/26: Corrected cloud

Update - Wed, 18 Feb 2026 22:13:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Washington DC Issue - zscalertwo.net

Tue, 17 Feb 2026 05:09:13 GMT

Zscaler has detected an issue with our Washington DC datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to irregular traffic forwarding behavior.

Latest Update - Wed, 18 Feb 2026 07:09:45 UTC

Zscaler has already implemented preliminary mitigation measures to address the issue, and no further issues have been reported. Therefore, we are marking this incident as resolved.

Update - Tue, 17 Feb 2026 06:37:51 UTC

Zscaler team has identified the root cause and is actively prioritizing the incident, exploring mitigation options, and working to restore service for all affected traffic.

Update - Tue, 17 Feb 2026 07:33:33 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 18 Feb 2026 07:09:45 UTC

Zscaler has already implemented preliminary mitigation measures to address the issue, and no further issues have been reported. Therefore, we are marking this incident as resolved.

User Authentication Issues - zscalertwo.net

Mon, 16 Feb 2026 17:18:19 GMT

Zscaler has detected an issue with the user authentication on its zscalertwo.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: Preliminary findings indicate that a temporary service routing issue delayed the distribution of updated security and access policies. Traffic continued to flow during this period, and policy propagation returned to normal once routing stabilized.

Latest Update - Mon, 16 Feb 2026 22:40:22 UTC

Update - Mon, 16 Feb 2026 18:14:09 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Mon, 16 Feb 2026 22:40:22 UTC

Zscaler Client Connector-Based End User Notifications Issue - zscloud.net, zscalerthree.net

Mon, 16 Feb 2026 06:54:07 GMT

Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on its zscloud.net, zscalerthree.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Resolved- Issue was related to node.

Update - Mon, 16 Feb 2026 06:57:02 UTC

Zscaler has implemented mitigation measures to address the issue. This incident is now resolved

Munich I Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 16 Feb 2026 04:12:24 GMT

Zscaler has detected an issue with its Munich I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- A hardware failure occurred within an upstream transit provider's network.

Update - Mon, 16 Feb 2026 04:03:34 UTC

The incident has been resolved without any intervention from Zscaler and we are investigating the root cause of the issue.

Scheduled Maintenance Extended - zscloud.net

Sun, 15 Feb 2026 05:48:03 GMT

Update - Sun, 15 Feb 2026 06:29:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zdxcloud.net

Sat, 14 Feb 2026 16:48:06 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zdxcloud.net cloud by 90 minutes. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 14 Feb 2026 17:45:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalertwo.net

Sat, 14 Feb 2026 05:19:43 GMT

Latest Update - Sat, 14 Feb 2026 09:50:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 14 Feb 2026 07:51:22 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud by 3 hours.

Update - Sat, 14 Feb 2026 09:50:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Logging zone Maintenance - private.zscaler.com

Sat, 14 Feb 2026 03:04:11 GMT

We will be performing routine maintenance on our logging infrastructure in the Prod DE2 Zones Logging Zones to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Admin UI dashboards and diagnostics may display incomplete data temporarily.
If alerts are configured for these components, false events may be triggered.
Nanolog enabled customer will see timeouts on the dashboards.

Important Note:This maintenance will not impact live traffic. ZCC enrollment and ZPA logins will remain unaffected, and all services will continue to operate normally

Update - Sat, 14 Feb 2026 15:03:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dallas II Datacenter Scheduled Maintenance - zscalertwo.net

Fri, 13 Feb 2026 23:09:18 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Dallas II (DFW2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 15, 6:00 pm PST (February 16, 2:00 UTC)

End time is February 16, 12:00 am PST (February 16, 8:00 UTC)

16 Feb 2026 - Extending Trust for 2 hours.

Update - Mon, 16 Feb 2026 08:40:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II Datacenter Scheduled Maintenance - zscalertwo.net

Fri, 13 Feb 2026 23:05:46 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Atlanta II (ATL2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 15, 6:00 pm PST (February 16, 2:00 UTC)

End time is February 15, 10:00 pm PST (February 16, 6:00 UTC)

Update - Mon, 16 Feb 2026 06:10:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Capetown IV Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 13 Feb 2026 11:00:46 GMT

Zscaler has detected an issue with its Capetown IV datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: An upstream provider experienced an issue impacting international connectivity in Europe.

Latest Update - Sat, 14 Feb 2026 12:16:39 UTC

Based on continuous monitoring and health checks, the issue is no longer present; therefore, we are marking this incident as resolved.

Update - Fri, 13 Feb 2026 11:14:22 UTC

Our preliminary analysis points toward an issue external to Zscaler’s infrastructure. We have engaged the relevant third-party providers and are simultaneously evaluating rerouting options to circumvent the impacted network path and minimize customer impact.

Update - Fri, 13 Feb 2026 12:23:34 UTC

Our upstream provider is experiencing an issue impacting international connectivity in Europe. This is not related to the CPT4 data center or our circuits. The provider has rerouted traffic via alternate paths; however, they are currently seeing congestion, and there is no ETA for full restoration at this time. We are actively implementing additional mitigations to restore connectivity and will provide updates as more information becomes available.

Update - Fri, 13 Feb 2026 13:39:06 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Sat, 14 Feb 2026 04:32:49 UTC

We continue to monitor the situation to ensure stability. While mitigation is in progress, updates will be shared as they become available.

Update - Sat, 14 Feb 2026 12:16:39 UTC

Based on continuous monitoring and health checks, the issue is no longer present; therefore, we are marking this incident as resolved.

Update - Sat, 14 Feb 2026 12:16:57 UTC

This incident has been resolved. Please contact Zscaler Support if you have additional questions.

User Authentication Issue on Mumbai VI, Chennai II, and Hyderabad I Datacenters. - zscaler.net

Thu, 12 Feb 2026 08:26:16 GMT

Zscaler has detected an issue with its Mumbai VI, Chennai II, and Hyderabad I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A subset of PSEs experienced connectivity issues reaching the Cache CA.

Latest Update - Thu, 12 Feb 2026 12:31:54 UTC

Update - Thu, 12 Feb 2026 11:17:19 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Thu, 12 Feb 2026 12:31:54 UTC

Sandbox and Site Review Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 08:00:33 GMT

Zscaler has detected an issue with its zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Issue occurred due to a recent upgrade that caused a configuration issue.

Latest Update - Thu, 12 Feb 2026 12:02:05 UTC

Based on our continuous monitoring and health checks, the issue is no longer present and services are working as expected. This incident is now resolved.

Update - Thu, 12 Feb 2026 08:26:24 UTC

Zscaler is actively working on isolating and mitigating the issue and further updates will be shared at the earliest.

Update - Thu, 12 Feb 2026 10:02:37 UTC

Zscaler has implemented the necessary measures, and the issue is now mitigated. Services are operating normally and will continue to be monitor to ensure stability.

Update - Thu, 12 Feb 2026 12:02:05 UTC

Based on our continuous monitoring and health checks, the issue is no longer present and services are working as expected. This incident is now resolved.

Update - Thu, 12 Feb 2026 12:05:56 UTC

This incident has been resolved. Please contact Zscaler Support if you have additional questions.

Reporting and Logging Issue - zscloud.net

Thu, 12 Feb 2026 06:43:32 GMT

Zscaler has detected an issue with Reporting and Logging on its zscloud.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The issue occurred due to a configuration issue, causing delays in log processing and log availability.

Latest Update - Mon, 16 Feb 2026 08:35:39 UTC

Zscaler deployed a permanent fix during the weekend maintenance window to address the issue. Based on continuous monitoring and health checks, the issue is no longer present. We are marking this incident as resolved.

Update - Thu, 12 Feb 2026 07:12:45 UTC

The Zscaler team has identified the root cause and is prioritizing the incident, exploring various mitigation options, and working to restore services.

Update - Thu, 12 Feb 2026 08:47:18 UTC

The earlier issue has recovered, and services are currently operating as expected. Our teams are actively monitoring the environment to ensure it remains stable and to quickly respond if any issues recur. In parallel, Zscaler is working on a permanent fix to prevent this from happening again, which is planned to be applied during the upcoming weekly maintenance window. The incident is currently mitigated and under monitoring.

Update - Thu, 12 Feb 2026 10:20:52 UTC

The issue has resurfaced, and we are currently working to isolate and resolve it.

Update - Thu, 12 Feb 2026 12:29:06 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Mon, 16 Feb 2026 08:35:39 UTC

Update - Mon, 16 Feb 2026 08:40:02 UTC

This incident has been resolved. Please contact Zscaler Support if you have additional questions.

Reporting and Logging Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 02:49:10 GMT

Zscaler has detected an issue with Reporting and Logging on its zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Network routing packet loss on certain paths caused web log performance degradation for some traffic patterns.

Latest Update - Thu, 12 Feb 2026 04:41:50 UTC

Zscaler is observing service recovery following a network routing issue that impacted performance for some traffic patterns. The underlying network path issue has been addressed, and validation testing indicates no ongoing packet loss on the previously affected routes. We are now observing that the previously reported web performance degradation has been resolved and services have returned to normal. Our teams implemented mitigations and verified recovery through monitoring and post-change validation.

Update - Thu, 12 Feb 2026 03:35:48 UTC

We have identified packet loss affecting specific network paths and are actively implementing mitigations, including routing changes to steer traffic around the affected segment.

Update - Thu, 12 Feb 2026 04:41:50 UTC

China Premium Access Plus Beijing V Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 00:33:17 GMT

Beijing V DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within these data centres may experience intermittent disconnections.

Start Time: 2026-05-15 14:00:00 UTC
End Time: 2026-05-16 02:00:00 UTC
(Datacenter Local Time 2026-05-15 22:00 - 2026-05-16 10:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

China Premium Access Plus Beijing V Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 00:31:11 GMT

Start Time: 2026-05-08 14:00:00 UTC
End Time: 2026-05-09 02:00:00 UTC
(Datacenter Local Time 2026-05-08 22:00 - 2026-05-09 10:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

China Premium Access Plus Beijing V Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 00:28:51 GMT

Start Time: 2026-04-17 14:00:00 UTC
End Time: 2026-04-18 02:00:00 UTC
(Datacenter Local Time 2026-04-17 22:00 - 2026-04-18 10:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 17 Apr 2026 23:15:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Plus Beijing V Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 00:25:52 GMT

Start Time: 2026-04-10 14:00:00 UTC
End Time: 2026-04-11 02:00:00 UTC
(Datacenter Local Time 2026-04-10 22:00 - 2026-04-11 10:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Sat, 11 Apr 2026 00:15:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Website Accessibility and Email Delivery Degradation in the US and EMEA Data Centers for a Public IP Subnet - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 12 Feb 2026 00:18:22 GMT

Zscaler is aware of and currently investigating website accessibility and email delivery degradation associated with an external reputation-based filtering service affecting a public IP subnet range. The impacted IP subnet has been flagged by a third-party reputation provider, which is preventing access to certain websites and causing email delivery failures to some destinations. Zscaler is actively engaged with the third-party reputation provider to expedite removal of the impacted subnet. At this time, there is no estimated time to resolution; however, mitigation actions are being evaluated to reduce customer impact.

Zscaler continues to closely monitor the situation and will provide updates as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The incident occurred due to a configuration change to a public IP subnet that triggered an automated third-party blocklist entry, resulting in outbound traffic and email delivery failures.

Latest Update - Sun, 15 Feb 2026 00:28:06 UTC

Following the actions previously taken, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Update - Thu, 12 Feb 2026 18:05:05 UTC

Zscaler has coordinated with the external reputation provider, and the reputation-related restriction affecting the impacted public IP range has now been removed. Remediation actions associated with this condition have been completed. Customers who previously experienced impact are requested to validate that normal website access and email delivery have been restored. Zscaler will continue to monitor the environment to ensure sustained service stability.

Update - Sun, 15 Feb 2026 00:28:06 UTC

Following the actions previously taken, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Dallas II Datacenter Scheduled Maintenance - zscalertwo.net

Wed, 11 Feb 2026 17:58:13 GMT

Zscaler will be performing planned maintenance at our Dallas II (DFW2) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 15, 5:00 pm PST (February 16, 1:00 UTC)

End time is February 15, 10:00 pm PST (February 16, 6:00 UTC)

DNS Update for Outbound Email DLP - zscaler.net, zscalertwo.net, zscalerthree.net

Wed, 11 Feb 2026 00:00:00 GMT

Zscaler will be moving outbound Email DLP traffic for the securemail.<cloudname> domain to previously advertised networks. For details, refer to config.zscaler.com/zscaler.net/email-dlp.

What is changing?

DNS resolution for securemail.<cloudname> will be updated to point to VIPs that are part of the subnets mentioned in the above article.

Who is impacted?
This change impacts customers sending outbound Google Workspace (G Suite) email through Zscaler SMTP egress IP ranges who previously updated their configuration to use in.securemail.<cloudname> on Feb 9. These customers may experience email rejection or non-delivery unless the egress IP ranges for securemail.<cloudname> are whitelisted in addition to those already whitelisted for in.securemail.<cloudname>.

This does not impact customers that have the subnets mentioned in securemail.<cloudname> whitelisted.

Action Required.

Customers using Google Workspace (G Suite) should whitelist the securemail.<cloudname> egress IP ranges before the change to ensure continued outbound email delivery when using securemail.<cloudname>. No action is required if using in.securemail.<cloudname>. For details, refer to config.zscaler.com/zscaler.net/email-dlp.

Customers are advised to refer to the Service Status section in their Zscaler customer support portal (CSP) for more details.

When is the update scheduled?

The update will be performed during the upcoming maintenance window on a per-cloud basis:

ZSN and ZS2 Clouds (all regions): Saturday, 1:00 AM – 6:00 AM UTC
ZS3 Cloud (all regions): Sunday, 1:00 AM – 6:00 AM UTC

Update - Mon, 16 Feb 2026 06:53:14 UTC

This maintenance activity is now completed.

Upcoming New Data Center and Old CIDR Deprecation - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Wed, 11 Feb 2026 01:06:11 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on February 10, 2026, we would like to notify you of the upcoming new data center at the location listed below. This would be available anytime on or after April 11, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Mexico City II	205.220.94.0/23	New data center
Americas	Mexico City II	205.220.100.0/23	New data center
Americas	Mexico City II	205.220.104.0/23	New data center
Americas	Mexico City II	205.220.106.0/23	New data center
Americas	Mexico City II	205.220.108.0/23	New data center
Americas	Mexico City II	205.220.110.0/23	New data center
Americas	Mexico City II	205.220.112.0/23	New data center
Americas	Mexico City II	205.220.114.0/23	New data center
Americas	Mexico City II	205.220.116.0/23	New data center
Americas	Mexico City II	2605:4300:3a00::/40	New data center
All	All	199.168.148.0/22*	Deprecated

*Applicable only to private.zscaler.com cloud

You can safely remove the reference to the deprecated IP address range because these addresses are no longer in use.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Munich I Datacenter Scheduled Maintenance - zscloud.net

Tue, 10 Feb 2026 21:18:19 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Munich I (MUC1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 12, 2:00 pm PST (February 12, 22:00 UTC)

End time is February 12, 7:00 pm PST (February 13, 3:00 UTC)

Update 2/11/26: Maintenance rescheduled to new time

Update - Fri, 13 Feb 2026 03:04:23 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II Datacenter Scheduled Maintenance - zscalertwo.net

Tue, 10 Feb 2026 19:24:00 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/nss

Maintenance Window:

Start time is February 12, 5:00 pm PDT (February 13, 1:00 UTC)

End time is February 12, 11:00 am PDT (February 13, 7:00 UTC)

Update 2/12: Extending maintenance

Update - Fri, 13 Feb 2026 07:01:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI (BOM6) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Tue, 10 Feb 2026 17:16:31 GMT

Zscaler will be performing hardware maintenance in Mumbai VI (BOM6) Datacenter .

Maintenance window:
Start: 2026-02-16 14:30 UTC
End: 2026-02-16 17:30 UTC
(Local Time 2025-12-16 20:00 - 2025-12-16 23:00 IST)

Update - Mon, 16 Feb 2026 15:43:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago 2 (CHI2) Datacenter Network Maintenance - zscalerthree.net

Tue, 10 Feb 2026 16:25:24 GMT

Zscaler will be performing hardware maintenance in the Chicago 2 (CHI2) Datacenter.

Maintenance window,
Start: 2026-02-13 04:00 CST
End: 2026-02-13 06:00 CST
(i.e. 2026-02-13 10:00 - 2026-02-13 12:00 UTC)

Update - Fri, 13 Feb 2026 12:11:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dallas I (DFW1) Datacenter Network Maintenance - zscalerthree.net

Tue, 10 Feb 2026 02:14:26 GMT

Zscaler will be performing hardware maintenance in Dallas I (DFW1) Datacenter.

Scheduled Maintenance window,
Start: 2026-02-12 02:00 UTC
End: 2026-02-12 04:00 UTC
(Local Time 2026-02-11 20:00 - 2026-02-11 22:00)

Update - Thu, 12 Feb 2026 03:47:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Paris IV Datacenter Scheduled Maintenance - zscaler.net

Tue, 10 Feb 2026 00:22:43 GMT

Zscaler will be performing planned maintenance at our Paris IV (PAR4) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 11, 9:00 am PDT (February 11, 17:00 UTC)

End time is February 11, 2:00 pm PDT (February 11, 22:00 UTC)

Update - Wed, 11 Feb 2026 21:35:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London V Datacenter Scheduled Maintenance - zscloud.net

Mon, 09 Feb 2026 19:22:35 GMT

Zscaler will be performing planned maintenance at our London V (LON5) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 11, 10:30 am PDT (February 11, 18:30 UTC)

End time is February 11, 2:30 pm PDT (February 11, 22:30 UTC)

Update - Wed, 11 Feb 2026 21:11:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Mon, 09 Feb 2026 17:43:40 GMT

Zscaler will be expanding its core platform services and will be performing planned maintenance at our San Francisco IV (SJC4) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window

Start time is February 10, 6:00 pm PST (February 11, 2:00 UTC)

End time is February 10, 11:00 pm PST (February 11, 7:00 UTC)

Update - Wed, 11 Feb 2026 05:57:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vancouver I (YVR1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Mon, 09 Feb 2026 07:22:32 GMT

Zscaler will be performing hardware maintenance in Vancouver I (YVR1) Datacenter.

Scheduled Maintenance window,
Start: 2026-02-19 09:00 UTC
End: 2026-02-19 13:00 UTC
(Local Time 2026-02-19 01:00 - 2026-02-19 05:00)

Update - Thu, 19 Feb 2026 12:59:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Toronto III (YTO3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Mon, 09 Feb 2026 06:35:58 GMT

Zscaler will be performing hardware maintenance in Toronto III (YTO3) Datacenter.

Scheduled Maintenance window,
Start: 2026-02-17 08:00 UTC
End: 2026-02-17 11:00 UTC
(Local Time 2026-02-17 03:00 - 2026-02-17 06:00 EST)

Trust post needs to be extended due to unforeseen onsite situation. New end time is 2026-02-17 14:00 UTC

Update - Tue, 17 Feb 2026 12:47:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Outbound DLP Email Delivery Failures via Zscaler SMTP IPs - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sun, 08 Feb 2026 21:24:51 GMT

Zscaler is currently investigating an issue where certain outbound email notifications are failing due to Zscaler SMTP IP addresses being flagged by an external third-party reputation service. This is resulting in email delivery disruptions for some customers. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The incident occurred due to a configuration gap in reverse DNS and SMTP identity alignment, which triggered delivery rejections by recipient systems enforcing third-party reputation policies.

Latest Update - Sun, 15 Feb 2026 18:09:18 UTC

All planned mitigation actions have been completed, including adding the Secure Mail entries for ZSN, ZSC, ZS2, and ZS3. We are no longer observing any abnormalities, and the incident is now considered resolved.

Update - Sun, 08 Feb 2026 21:52:11 UTC

Update - Sun, 08 Feb 2026 23:04:13 UTC

We are continuing to investigate an issue impacting outbound email delivery for some customers. Our teams are actively working to determine the cause and restore normal service. Further updates will be provided as more information becomes available.

Update - Mon, 09 Feb 2026 00:22:21 UTC

We are continuing to investigate an issue impacting outbound email delivery. A potential fix has shown positive results in internal testing; however, validation is still ongoing and will require additional time. Zscaler teams remain fully engaged. Further updates will be provided as progress is made.

Update - Mon, 09 Feb 2026 02:25:30 UTC

Zscaler has engaged the email service provider’s support team, and the teams have confirmed that automated anti-spam controls are enforcing a third-party blocklist, which is causing some emails from affected Zscaler SMTP egress IPs to be rejected. Zscaler is working in parallel with the provider and the blocklist operator to expedite delisting of the impacted IPs; escalations are in progress and all impacted IPs have been submitted for review while remediation efforts continue to restore full service stability.

Update - Mon, 09 Feb 2026 04:18:41 UTC

Zscaler has identified a mitigation strategy to reduce impact from this issue and is actively implementing it to restore full service stability as quickly as possible.

Update - Mon, 09 Feb 2026 04:47:18 UTC

Zscaler teams have taken steps to mitigate the impact of this issue while we continue to work with the third party to fully resolve it and restore service stability.

Update - Mon, 09 Feb 2026 05:32:52 UTC

We have implemented a temporary mitigation to address the email delivery failures by redirecting traffic to alternate Email DLP clusters that are not impacted by the third-party blocklist. As a result, affected customers should now see email delivery restored while we continue working with the third party on permanent remediation (including delisting and policy override options). Customers using Google Workspace (G Suite) may need to whitelist the updated egress IP ranges to ensure continued email delivery. Customers are advised to refer to the Service Status section in their Zscaler customer support portal (CSP) for more details.

Update - Mon, 09 Feb 2026 16:02:12 UTC

The actions implemented earlier have provided a temporary mitigation and continue to be effective. Zscaler is working with the third-party provider on a permanent remediation, and progress is being made. We will share a further update as more details become available.

Update - Mon, 09 Feb 2026 21:40:45 UTC

Zscaler continues to work with the third-party provider on a permanent remediation. Portions of the fix have been completed and are in place, and we are actively working on the remaining items. We will share further updates as more details become available.

Update - Tue, 10 Feb 2026 06:39:11 UTC

Zscaler has finalized the necessary steps to achieve full resolution for the incident. As part of the standard weekend maintenance window across all cloud environments, we will apply a permanent fix to remediate the recently observed issue. The temporary mitigation currently in effect will remain active until the fix is fully implemented.

Update - Wed, 11 Feb 2026 09:56:20 UTC

Previously, Zscaler implemented a temporary mitigation to address email delivery failures by updating DNS to redirect Email DLP traffic to alternate clusters that were not impacted by a third-party blocklist. Zscaler has now finalized the steps required for full resolution and, as part of the standard weekend maintenance window across all cloud environments, will apply a permanent fix to remediate the recently observed issue. Customers should review and complete any applicable action items outlined in the advisory; the implementation schedule is also available in the advisory link.

Update - Sun, 15 Feb 2026 18:09:18 UTC

Performance Degradation in Mumbai VI (BOM6) Data Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sun, 08 Feb 2026 19:54:59 GMT

Zscaler investigated reports of intermittent performance degradation impacting a subset of customers whose traffic was primarily traversing the Mumbai VI (BOM6) data center. Affected customers may have experienced a significant reduction in internet throughput, resulting in slow application performance and degraded browsing experience. Zscaler has identified the underlying issue and implemented targeted mitigation actions. The environment is being closely monitored to ensure stability during peak and business-hour traffic conditions, after which the mitigation will be extended as appropriate.

Customers who continue to experience traffic impact may consider temporarily steering traffic to a secondary or alternate Zscaler data center. For more information, please refer to the following support article.

For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and updates will be posted there as they become available.

Root cause- Incident caused by a latent software defect.

Latest Update - Thu, 12 Mar 2026 08:10:19 UTC

A fix for the defect causing performance issues for a subset of customers has been deployed on the remaining zscalerone.net, zscalertwo.net, and zscloud.net clouds. As a result, we are marking this incident as resolved.

Update - Wed, 11 Feb 2026 13:47:44 UTC

Zscaler continues to work on a permanent fix. In the meantime, we’ve implemented mitigations in the Mumbai VI (BOM6) data center and continue to monitor.

Update - Tue, 24 Feb 2026 19:04:36 UTC

Based on ongoing telemetry analysis and continuous service monitoring, we are observing stable system behavior with no further customer impact and no additional customer reports. As part of our continued focus on service resiliency and long-term stability, additional enhancements are in progress and will be deployed during an upcoming cloud maintenance window to further strengthen overall service stability and operational safeguards. We will continue to monitor closely and provide updates as appropriate.

Update - Thu, 26 Feb 2026 15:11:56 UTC

A fix for the defect causing performance issues for a subset of customers has been deployed on zscaler.net and zscalerthree.net clouds, remaining clouds will receive the fix in next two weeks as part of the scheduled update cycle.

Update - Thu, 12 Mar 2026 08:10:19 UTC

San Francisco IV (SJC4) Datacenter Network Maintenance - zscaler.net, zscalertwo.net

Sun, 08 Feb 2026 04:19:39 GMT

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
Start: 2026-02-10 04:30 UTC
End: 2026-02-10 07:30 UTC
(Local Time 2026-02-09 20:30 - 2026-02-09 23:30)

Update - Tue, 10 Feb 2026 05:54:59 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Madrid III and Madrid IV datacenters - zscalertwo.net

Sat, 07 Feb 2026 23:33:47 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Madrid III and Madrid IV datacenters on the zscalertwo.net cloud. This maintenance is scheduled for Sunday at 1:00 PM Pacific Time on Feb 8, 2026 (Sunday, Feb 8, 2026 9:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sun, 08 Feb 2026 21:38:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Logging zone maintenance - zpatwo.net

Sat, 07 Feb 2026 03:03:04 GMT

We will be performing routine maintenance on our logging infrastructure in the ZPATWO DE1 Logging Zone to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Admin UI dashboards and diagnostics may display incomplete data temporarily.
If alerts are configured for these components, false events may be triggered.
Nanolog enabled customer will see timeouts on the dashboards.

Important Note:This maintenance will not impact live traffic. ZCC enrollment and ZPA logins will remain unaffected, and all services will continue to operate normally

Update - Sat, 07 Feb 2026 16:26:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming New Cloud NSS regions and Expansions - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 06 Feb 2026 21:31:05 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification and Trust sent on December 23, 2025, we would like to remind you of the upcoming new and expanded Cloud NSS regions as listed in the following table. The services through the new IP address ranges will become available any time on or after February 21, 2026.

Region	IP Addresses	Notes
US-East	170.85.129.248/29	Expansion of existing region
US-West	170.85.231.248/29	Expansion of existing region
EU-West	87.58.119.248/29	Expansion of existing region
AP SouthEast (Singapore)	47.130.161.170 52.76.119.12	New region
AP NorthEast (Japan)	52.194.84.57 13.159.249.250	New region

For more information, please visit:

https://config.zscaler.com/zscalertwo.net/nss

https://config.zscaler.com/zscalerthree.net/nss

https://config.zscaler.com/zscloud.net/nss

https://config.zscaler.com/zscalerone.net/nss

https://config.zscaler.com/zscalerbeta.net/nss

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Alt Cloud Global Enablement on ZPATwo cloud - zpatwo.net

Fri, 06 Feb 2026 18:24:04 GMT

Zscaler will be enabling the "Alt Cloud" feature globally on Saturday, February 14th between 02:00 - 05:30 UTC (All Regions Service Update Schedule). This feature is designed to allow ZPA components within China to connect using an alternative domain name, which is less susceptible to blocking by their ISPs, thereby enhancing connectivity resilience.

When this feature is enabled, on all App Connectors all the Control channel connections (excluding data connections) will briefly disconnect and immediately reconnect. There will be no impact to user traffic.

Update - Sun, 15 Feb 2026 00:26:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Device registration and portal failure for Zscaler Client Connector - zscaler.net, zscalertwo.net

Fri, 06 Feb 2026 13:11:07 GMT

We are investigating device registration failures issue with our zscaler.net, zscalertwo.net Clouds. For additional information please reach out to Zscaler Support referencing this incident, status changes will be updated here as they become available.

Root cause- The issue occurred because a third-party cross-connect provider experienced a fiber outage.

Update - Fri, 06 Feb 2026 13:07:43 UTC

The incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

SCIM Auto-provisioning issue - zscalerone.net

Fri, 06 Feb 2026 13:05:40 GMT

Zscaler has detected an issue with the SCIM-based provisioning for users on its zscalerone.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Fri, 06 Feb 2026 13:02:34 UTC

This incident has been resolved. Please contact Zscaler Support if you have additional questions.

San Francisco IV Datacenter Issue - zscalertwo.net, zscalerthree.net

Fri, 06 Feb 2026 12:59:33 GMT

Zscaler has detected an issue with its San Francisco IV datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Fri, 06 Feb 2026 12:44:46 UTC

The incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.zsdpc.net

Thu, 05 Feb 2026 05:07:14 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on February 5th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Thu, 05 Feb 2026 07:02:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dusseldorf I Datacenter Issue - zscalertwo.net

Thu, 05 Feb 2026 02:50:53 GMT

Zscaler has detected an issue with our Dusseldorf I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause- The issue occurred during a planned change to update services for cloud optimization.

Impacted Service - Traffic forwarding | IPSEC and ZCC Tunnel 2.0 | zscalertwo.net

Update - Thu, 05 Feb 2026 03:25:49 UTC

Zscaler has successfully implemented a mitigation for the issue and the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Issues accessing external resources including Microsoft applications through the Hong Kong III data center - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 05 Feb 2026 02:00:07 GMT

Zscaler has detected an issue with its Hong Kong III datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The preliminary root cause points to an issue within a third‑party CDN provider’s infrastructure impacting affected destinations.

Latest Update - Fri, 06 Feb 2026 03:22:36 UTC

The issue has been resolved, and service has remained stable since the correction. While no changes were required within the Zscaler service, we are working with the third-party CDN provider to identify the root cause and prevent recurrence.

Update - Thu, 05 Feb 2026 03:35:40 UTC

Initial investigation suggests the issue is impacting destinations fronted by a third party CDN provider. We are actively engaging with the provider through available channels to support further investigation and resolution.

Update - Thu, 05 Feb 2026 04:25:44 UTC

In parallel with our ongoing investigation, we recommend impacted customers also open a case with the relevant CDN provider for the impacted domains and reference observed connectivity failures from the HKG3 DC. We are actively attempting to engage the third‑party provider through available channels and will provide further updates as more information or mitigations become available.

Update - Thu, 05 Feb 2026 05:04:17 UTC

We are actively coordinating with the CDN provider. At this time, there is no issue identified within Zscaler infrastructure, and the impact appears to be isolated to the CDN provider. Impacted customers are advised to open a case with their CDN provider for the affected domains and reference the observed connectivity failures from the HKG3 data center.

Update - Thu, 05 Feb 2026 06:50:08 UTC

We are coordinating with the CDN provider (Akamai). At this time, no issues have been identified within Zscaler infrastructure, and the impact appears isolated to the CDN provider. Impacted customers are advised to open a support case with their CDN provider for the affected domains and reference the observed connectivity failures originating from the HKG3 data center. No ETA is available at this time. Status updates will be shared when available.

Update - Thu, 05 Feb 2026 08:05:06 UTC

The Zscaler team was working on a mitigation. While it was being implemented, we started seeing improvements in the services, even though no changes had been made on the Zscaler side. We will continue to monitor closely and work with the CDN provider to confirm the root cause and next steps.

Update - Fri, 06 Feb 2026 03:22:36 UTC

Upcoming BOM6 Data Center Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 05 Feb 2026 00:22:16 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on February 4, 2026, we would like to notify you of the upcoming data center expansion at the location listed below. This would be available anytime on or after April 5, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
APAC	Mumbai VI	101.2.248.0/23	Expansion of existing DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/hubs

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Changes to Zscaler Hub IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Thu, 05 Feb 2026 00:16:03 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on February 4, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after April 5, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address range to avoid any service disruption.

CIDR	Notes
205.220.118.0/23	New addition to Required Hub IP addresses
101.2.244.0/23	New addition to Required Hub IP addresses
199.168.148.0/22	Removed from Recommended section

For more information, please visit:

https://config.zscaler.com/zscloud.net/hubs

https://config.zscaler.com/zscalerone.net/hubs

https://config.zscaler.com/zscalertwo.net/hubs

https://config.zscaler.com/zscalerthree.net/hubs

https://config.zscaler.com/zdxcloud.net/hubs

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Chicago I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Wed, 04 Feb 2026 20:17:11 GMT

Zscaler will be expanding its core platform services and will be performing planned maintenance at our Chicago I (CHI1) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window

Start time is February 5, 4:00 pm PST (February 6, 00:00 UTC)

End time is February 5, 9:00 pm PST (February 6, 5:00 UTC)

Update - Fri, 06 Feb 2026 05:08:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Washington I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Wed, 04 Feb 2026 20:15:33 GMT

Zscaler will be expanding its core platform services and will be performing planned maintenance at our Washington I (WAS1) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window

Start time is February 5, 4:00 pm PST (February 6, 00:00 UTC)

End time is February 5, 9:00 pm PST (February 6, 5:00 UTC)

Update - Fri, 06 Feb 2026 05:09:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Beijing I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Wed, 04 Feb 2026 18:22:50 GMT

Zscaler will be performing planned maintenance at our Beijing I (BJS1) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 10, 10:00 am PDT (February 10, 18:00 UTC)

End time is February 10, 3:00 pm PDT (February 10, 23:00 UTC)

Update - Tue, 10 Feb 2026 22:48:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New Cloud Connector and Branch Connector Deployment Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 03 Feb 2026 17:40:23 GMT

Zscaler is investigating an issue impacting customers performing new Cloud Connector and Branch Connector deployment operations across zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud. Existing Cloud Connector and Branch Connector instances remain unaffected. Customers attempting to deploy new Cloud Connector or Branch Connector instances may experience deployment failures. Newly provisioned connectors are unable to retrieve required software packages, which can prevent successful startup.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Affected Services: Zscaler Branch Connector and Cloud Connector

Root cause: The incident resulted from a compatibility issue during a service update that affected new connector deployments. Full details will be provided in the final Root Cause Analysis report.

Latest Update - Wed, 04 Feb 2026 16:46:30 UTC

Following the mitigation, Zscaler has received positive confirmation from impacted customers, and ongoing monitoring indicates stable service behavior. The incident has now been resolved.

Update - Tue, 03 Feb 2026 17:55:43 UTC

Update - Tue, 03 Feb 2026 18:22:05 UTC

Zscaler has identified the cause of the issue and is implementing the necessary fix to restore normal service. Further updates will be provided as progress is made.

Update - Tue, 03 Feb 2026 19:24:24 UTC

Zscaler continues to work on an issue impacting the deployment of new Cloud Connector and Branch Connector instances. A mitigation has been deployed, and validation is currently in progress across regions. Initial validation is successful in some environments; however, additional testing is ongoing to ensure consistent behavior across all deployments. Customers attempting to deploy new Cloud Connector or Branch Connector instances may continue to experience deployment failures during this period. Existing, already-running connector instances remain unaffected. Further updates will be provided as validation progresses.

Update - Tue, 03 Feb 2026 21:17:33 UTC

Zscaler continues to validate a fix for an issue impacting the deployment of new Cloud Connector and Branch Connector instances. Progress has been observed in multiple environments, and additional validation is ongoing. Existing connector instances remain unaffected.

Update - Tue, 03 Feb 2026 21:36:02 UTC

Zscaler has resolved the issue impacting the deployment of new Cloud Connector and Branch Connector instances. The fix has been validated across environments, and systems are now operating as expected. Zscaler is continuing to monitor the service to ensure ongoing stability.

Update - Wed, 04 Feb 2026 16:46:30 UTC

Following the mitigation, Zscaler has received positive confirmation from impacted customers, and ongoing monitoring indicates stable service behavior. The incident has now been resolved.

Shanghai IV and Shanghai VI Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 03 Feb 2026 09:12:00 GMT

Zscaler has detected an issue with its Shanghai IV, Shanghai VI datacenter and is currently investigating the matter. Customers may experience intermittent disconnects, authentication failures, degraded performance, or increased latency when accessing international destinations. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Issue occurred due to congestion along the network path related to a subsea cable fault.

Latest Update - Mon, 09 Feb 2026 13:38:33 UTC

Zscaler has received confirmation from our partner that the impacted submarine cable has been repaired. We are now seeing improved connectivity across all data centers, with reduced packet loss and positive customer feedback. This incident is now marked as Resolved.

Update - Tue, 03 Feb 2026 09:16:38 UTC

Zscaler has isolated the ongoing issue to submarine cable repairs, which are outside the control of both Zscaler and our partner. As a result, an estimated time to restoration (ETR) is not available at this time. Further updates will be shared as they become available.

Update - Tue, 03 Feb 2026 10:56:37 UTC

Zscaler has isolated the issue to congestion and ongoing submarine cable repairs impacting the forward path from customers to the Zscaler data centers. Customers can work with their ISP/carrier to reroute traffic and bypass the impacted path where possible while repairs are in progress.

Update - Thu, 05 Feb 2026 16:25:15 UTC

Zscaler continues to work with our carrier partner. At this time, there is no new update to share regarding the congestion/submarine cable repairs, and we will continue to follow up with the carrier. Where possible, customers may also work with their ISP/carrier to explore rerouting options to bypass the impacted path and associated congestion while repairs are in progress.

Update - Fri, 06 Feb 2026 08:07:33 UTC

Zscaler has received an update from the partner that the submarine cable has been repaired, and we’re seeing improved connectivity across all data centers with reduced packet loss and positive customer feedback. We will continue to monitor the situation to ensure stability.

Update - Mon, 09 Feb 2026 13:38:33 UTC

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net

Tue, 03 Feb 2026 05:04:11 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on February 3rd, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Tue, 03 Feb 2026 07:17:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Additions to HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Tue, 03 Feb 2026 00:53:19 GMT

Dear Customer,

In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on December 17, 2025, we would like to remind you of the upcoming addition to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after February 15, 2026.

Required

137.31.0.0/22

Please update your firewall policy rules and any upstream access control lists to allow the new IP address range to avoid any service disruption.

For more information, please visit:

https://config.zscaler.com/zscaler.net/hubs

https://config.zscaler.com/zscloud.net/hubs

https://config.zscaler.com/zscalerone.net/hubs

https://config.zscaler.com/zscalertwo.net/hubs

https://config.zscaler.com/zscalerthree.net/hubs

https://config.zscaler.com/zdxcloud.net/hubs

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Reminder Notification for Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 03 Feb 2026 00:43:26 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on December 17, 2025, we would like to remind you of the upcoming data center expansions at the locations listed below. These would be effective anytime on or after February 15, 2026.

Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Chicago II	198.14.90.0/23	Expansion of existing DC
EMEA	Warsaw II	159.254.192.0/23	Expansion of existing DC
EMEA	Warsaw II	159.254.194.0/23	Expansion of existing DC
EMEA	Vienna I	159.254.196.0/23	Expansion of existing DC
EMEA	Vienna I	159.254.198.0/23	Expansion of existing DC

We recommend that you add the IP address ranges listed in the “Zscaler Aggregate IP Address Ranges’’ section of the CENR page to your access control lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

https://config.zscaler.com/zpatwo.net/zpa

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Dallas II Datacenter Scheduled Maintenance - zscalertwo.net, zscalerthree.net

Mon, 02 Feb 2026 23:47:58 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 5, 5:00 pm PDT (February 6, 1:00 UTC)

End time is February 5, 1:00 am PDT (February 6, 9:00 UTC)

Update 2/2: Maintenance postponed to new date
Update 2/5: Maintenance Extended

Update - Fri, 06 Feb 2026 09:20:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on AMER region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 02 Feb 2026 20:16:18 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the AMER region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 5:00 PM Pacific Time on Feb 7, 2026 (Sunday, Feb 8, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sun, 08 Feb 2026 03:16:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on EMEA region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 02 Feb 2026 20:12:40 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the EMEA region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 5:00 PM Pacific Time on Feb 6, 2026 (Saturday, Feb 7, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 07 Feb 2026 04:53:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on APAC region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 02 Feb 2026 20:09:30 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the APAC region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 5:00 AM Pacific Time on Feb 7, 2026 (Saturday, Feb 7, 2026 01:00 PM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 07 Feb 2026 16:09:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance on Oceania region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 02 Feb 2026 20:06:12 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the Oceania region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 1:00 AM Pacific Time on Feb 6, 2026 (Friday, Feb 6, 2026 09:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 06 Feb 2026 12:35:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZCC Android Defect Update - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 02 Feb 2026 00:00:00 GMT

Zscaler is aware of a problem with the current 4.1.0.53 Zscaler Client Connector (ZCC) for Android and Android on ChromeOS. On February 2, 2026, Zscaler published the Zscaler Client Connector (ZCC) version 4.1.0.63 release for Android and ChromeOS. Immediately upgrade your Zscaler Client Connector to the latest version for Android in the Google Play Store.

Shanghai, Shanghai II and Beijing III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 02 Feb 2026 03:04:45 GMT

Zscaler has detected an issue with its Shanghai, Shanghai II, and Beijing III datacenters and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Submarine Cable Fault / Congestion in the network path | Traffic Forwarding | ZSC, ZS2, ZSN, ZS3, ZPA clouds

Latest Update - Tue, 10 Feb 2026 14:36:47 UTC

Zscaler has received confirmation that the submarine cable issue has been remediated and has verified improvements in the affected network path where congestion was previously observed. Following a monitoring period, Zscaler confirms the incident is resolved.

Update - Mon, 02 Feb 2026 03:40:08 UTC

Zscaler has identified issue with its carrier partner and working to the resolve the issue. Updated will be shared as they become available.

Update - Mon, 02 Feb 2026 07:28:48 UTC

Zscaler continues to work with its carrier partner to expedite resolution, and additional updates will be provided as they become available.

Update - Mon, 02 Feb 2026 12:15:44 UTC

Zscaler continues to work with its carrier partner to expedite resolution and will share further updates as they become available.

Update - Mon, 02 Feb 2026 16:27:35 UTC

Zscaler has received confirmation from its carrier partner that the issue is due to congestion along the network path related to subsea cable impacts. Zscaler continues to work with the partner to investigate and implement any potential mitigations.

Update - Tue, 03 Feb 2026 04:17:01 UTC

Zscaler has not received new updates from its carrier partner. The ongoing submarine cable repairs are outside of Zscaler’s and the partner’s control; therefore, no estimated time to restoration (ETR) is available at this time. Further updates will be shared as they become available.

Update - Tue, 03 Feb 2026 07:44:57 UTC

Zscaler has still not received any new updates from its carrier partner. The ongoing submarine cable repairs remain outside of Zscaler’s and the partner’s control; therefore, an estimated time to restoration (ETR) is not available at this time. As the investigation continues, we have expanded the list of impacted data centers and extended the impact details based on the latest findings. We will share further updates as soon as new information becomes available.

Update - Thu, 05 Feb 2026 16:26:00 UTC

Update - Fri, 06 Feb 2026 12:12:06 UTC

The Zscaler teams have received an update that the submarine cable fault has been fixed, and Zscaler has verified improvement along the affected network paths. To validate the effectiveness of the fix, Zscaler will continue to monitor the situation closely to ensure ongoing stability and to promptly address any recurrence or new issues that may arise. Customers who are able to do so are requested to retest and provide feedback.

Update - Tue, 10 Feb 2026 14:36:47 UTC

ZPA Browser-Based and Privileged Remote Access Application Accessibility Issue - private.zscaler.com

Sun, 01 Feb 2026 17:59:09 GMT

Zscaler detected an issue impacting the private.zscaler.com Cloud. A subset of customers in the impacted environments might have observed the following:

Loss of access to browser based applications
Loss of access to Privileged Remote Access applications

ZCC enrollment and ZPA logins remain fully functional, and all other production services continue to operate normally. We have identified the root cause and remediated to bring access back to all configured browser based and Privileged Remote Access applications.

For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause: During a planned maintenance window, a service configuration change intended to enhance logging capabilities resulted in a temporary disruption to ZPA Browser Access and Privileged Remote Access.

Update - Sun, 01 Feb 2026 20:46:34 UTC

Atlanta II Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Sat, 31 Jan 2026 03:12:20 GMT

Zscaler is currently investigating reports of an issue with its Atlanta II datacenter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and updates will be posted there as they become available.

Incident Status- Resolved

Root Cause: Preliminary findings indicate an interconnect fault that caused packet loss, resulting in intermittent accessibility issues.

Latest Update - Sat, 31 Jan 2026 05:32:16 UTC

Following the actions previously taken by Zscaler, the incident has been resolved.

Update - Sat, 31 Jan 2026 04:26:01 UTC

Zscaler has successfully implemented a mitigation for the issue, completed at 03:49 UTC, 31 Jan 2026. Initial test results suggest that the mitigation effectively resolves the issue. We are currently conducting further validation through internal testing and gathering customer feedback to ensure that the problem is fully addressed and the service is functioning as intended.

Update - Sat, 31 Jan 2026 05:32:16 UTC

Following the actions previously taken by Zscaler, the incident has been resolved.

Tokyo IV Datacenter Scheduled Maintenance - zscalertwo.net

Sat, 31 Jan 2026 02:31:49 GMT

Zscaler will be performing planned maintenance at our Tokyo IV (TYO4) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 3, 8:00 am PDT (February 3, 16:00 UTC)

End time is February 3, 2:00 pm PDT (February 3, 22:00 UTC)

Update - Tue, 03 Feb 2026 19:24:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Rio de Janeiro I Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Sat, 31 Jan 2026 02:27:05 GMT

Zscaler has detected an issue with its Rio de Janeiro I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Incident Status- Resolved

Root Cause: The incident was caused by an issue within a carrier partner’s network infrastructure.

Latest Update - Sat, 31 Jan 2026 03:23:10 UTC

This incident has been resolved. Please contact Zscaler Support if you have additional questions.

Update - Sat, 31 Jan 2026 02:53:55 UTC

Zscaler has collaborated with its carrier partner to resolve the issue and is now monitoring the situation to ensure ongoing stability.

Update - Sat, 31 Jan 2026 03:23:10 UTC

This incident has been resolved.

Washington I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Sat, 31 Jan 2026 00:02:50 GMT

Zscaler will be expanding its core platform services and will be performing planned maintenance at our Washington I (WAS1) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window

Start time is February 3, 3:00 pm PST (February 3, 23:00 UTC)

End time is February 3, 8:00 pm PST (February 4, 4:00 UTC)

Update - Wed, 04 Feb 2026 02:08:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI Datacenter Scheduled Maintenance - zscalerthree.net

Fri, 30 Jan 2026 19:47:34 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 2, 12:00 pm PDT (February 2, 20:00 UTC)

End time is February 2, 5:00 pm PDT (February 3, 1:00 UTC)

Update - Tue, 03 Feb 2026 02:36:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Singapore V Datacenter Scheduled Maintenance - zscalerthree.net

Fri, 30 Jan 2026 19:24:44 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is February 5, 7:00 am PDT (February 5, 15:00 UTC)

End time is February 5, 12:00 pm PDT (February 5, 20:00 UTC)

Update - Thu, 05 Feb 2026 22:35:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZIdentity Service Upgrade - zslogin.net

Fri, 30 Jan 2026 17:40:12 GMT

Zscaler will be performing a planned upgrade of the ZIdentity (ZID) service between 01:00 UTC and 03:00 UTC. This upgrade introduces new feature enhancements and includes several bug fixes to improve platform reliability and performance.

During this window, users may experience intermittent login or portal access issues for approximately 30–45 minutes following the upgrade. If you continue to experience any access issues beyond the scheduled window, please reach out to Zscaler Support for assistance.

Authentication Issue on Zscaler Client Connector for Android - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 29 Jan 2026 23:21:49 GMT

Zscaler is investigating reports of an authentication issue affecting a subset of Android users who authenticate using Microsoft Entra ID. Impacted users may encounter an error stating “SSL Error occurred. The server certificate is not trusted” when attempting to sign in to the Zscaler Client Connector.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The root cause was determined to be delayed security updates on affected Android and Chromebook devices, which prevented them from recognizing the latest intermediate certificate.

Latest Update - Wed, 04 Feb 2026 04:39:57 UTC

Based on feedback from several customers and the absence of any new reports, we believe the security update is now in effect and are considering the issue to be resolved.

Update - Fri, 30 Jan 2026 01:53:07 UTC

Zscaler is actively investigating this issue and has prioritized efforts to isolate the cause. Based on initial analysis, the behavior appears to be related to a recent intermediate certificate change associated with Microsoft authentication services. We appreciate your patience as we continue our investigation and work toward a resolution. Additional updates will be shared as more information becomes available.

Update - Fri, 30 Jan 2026 03:06:52 UTC

Zscaler has implemented a validated workaround to mitigate the issue. The permanent resolution will occur automatically when the updated CA is distributed through Microsoft Security Updates.

Update - Wed, 04 Feb 2026 04:39:57 UTC

Based on feedback from several customers and the absence of any new reports, we believe the security update is now in effect and are considering the issue to be resolved.

Urgent China Premium Access Shanghai IV (SHA4) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 30 Jan 2026 00:51:20 GMT

Shanghai IV DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Services within these data centres may experience intermittent disconnections.

Start Time: 2026/01/30 20:00 UTC
End Time: 2026/01/30 22:00 UTC
(Datacenter Local Time 2026/01/31 04:00 - 2026/01/31 06:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update 1/29: Fixed Trust Title to reflect SHA4 DC

Update - Sat, 31 Jan 2026 05:07:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Denver III datacenter - zscalertwo.net

Thu, 29 Jan 2026 22:25:53 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Denver III datacenter on the zscalertwo.net cloud. This maintenance is scheduled for Friday at 03:00 AM Pacific Time on Jan 30, 2026 (Friday, Jan 30, 2026 11:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 30 Jan 2026 13:53:46 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Madrid III and Madrid IV datacenters - zscaler.net

Thu, 29 Jan 2026 22:02:40 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Madrid III and Madrid IV datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 03:00 PM Pacific Time on Jan 29, 2026 (Thursday, Jan 29, 2026 11:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 29 Jan 2026 23:28:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 29 Jan 2026 06:50:46 GMT

Zscaler has detected an issue with its Mumbai VI datacenter and is currently investigating reports of slowness. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Wed, 04 Feb 2026 16:31:48 UTC

Zscaler has completed additional optimization measures, providing further mitigation beyond the actions taken last week. Zscaler teams have continued to monitor the environment and validate service stability. This issue is now resolved.

Update - Thu, 29 Jan 2026 18:05:07 UTC

Zscaler has identified the issue and has implemented necessary actions to improve service availability and stabilize performance. Zscaler teams continue to actively monitor the environment, evaluate additional optimization measures, and seek customer feedback to confirm service stability. Further updates will be provided as monitoring continues.

Update - Fri, 30 Jan 2026 14:09:46 UTC

Following the mitigation actions taken to improve service availability and stabilize performance, Zscaler will continue to monitor the situation closely throughout the weekend and into early next week’s business hours to ensure ongoing stability and to promptly address any potential recurrence or new issues.

Update - Mon, 02 Feb 2026 14:22:45 UTC

Zscaler confirmed that the previously implemented mitigation actions to improve service availability and stability remain effective. We continue to monitor the environment while the Zscaler teams implements additional measures to help prevent recurrence.

Update - Wed, 04 Feb 2026 16:31:48 UTC

Tokyo V Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net

Wed, 28 Jan 2026 22:39:39 GMT

Zscaler will be performing planned maintenance at our Tokyo V (TYO5) Data Center.

We expect minimal to no impact to services during the maintenance window.

Maintenance Window:

Start time is February 3, 7:00 am PDT (February 3, 15:00 UTC)

End time is February 3, 1:00 pm PDT (February 3, 21:00 UTC)

Update - Tue, 03 Feb 2026 21:22:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo V Datacenter Scheduled Maintenance - zscloud.net

Wed, 28 Jan 2026 22:35:41 GMT

Zscaler will be expanding its global data center footprint and performing planned maintenance at our Tokyo V (TYO5) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit: