Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has resolved the issue affecting audit log visibility in the admin portal. The underlying cause has been addressed and audit logs are now visible and accessible across all affected clouds.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has resolved the issue preventing a subset of administrators from logging into the Zscaler Admin Console. The issue was caused by a routing defect introduced in a recent build upgrade that caused IDP-based authentication requests to be misrouted to an incorrect region, resulting in a tenant lookup failure and 401 unauthorized error. The build has been successfully rolled back to the previous stable version, and admin console login has been confirmed restored.
Mexico City II Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler can confirm that the issue has been resolved without any intervention. Preliminary findings indicate that the issue was observed within the network provider’s infrastructure, and our monitoring has confirmed that the network is stable.
Risk360 Data Update and Risk Score Accuracy Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zscalerrisk.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has resolved the issue causing interrupted ZPA-related data updates in Risk360. Affected connectors have been successfully reactivated and data updates have resumed across impacted accounts. A code-level fix addressing the underlying cause has been deployed to production. Risk360 data and risk scores are confirmed accurate and the issue is resolved.
Network Connectivity Degradation — Mexico City I and Mexico City II Data Centers - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the routing adjustments applied by Zscaler, service has been restored at the Mexico City I and Mexico City II data centers, and monitoring has confirmed continued stability. The incident is resolved. The routing adjustments remain in place while the third-party provider completes permanent repairs to the affected connectivity.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has resolved an issue where a subset of customers across ZSNet and ZSCloud may have experienced disruption in Cloud NSS firewall log delivery to their configured SIEMs. The issue has been fully resolved and services are confirmed stable.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
A fix has been verified and is planned for release in an upcoming production update, with more details to be shared as they become available.
Legacy Incident Archive
453 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
April 2026
Atlanta II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net
majorSource not attested
Last archived state: investigating
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investigating
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, 7:00 UTC)
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)
Boston I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net
majorSource not attested
Last archived state: investigating
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investigating
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)
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)
Tokyo IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net
majorSource not attested
Last archived state: investigating
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investigating
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)
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 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Scheduled Maintenance Extended - EMEA Region - zscloud.net
majorSource not attested
Last archived state: investigating
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investigating
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 UTCThis activity has ...
China Premium Access Plus Beijing V and Shanghai VI Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
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 UTCEnd 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 ...
Urgent Maintenance - zscalerone.net
majorSource not attested
Last archived state: investigating
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investigating
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.During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updat...
Urgent Maintenance - zdxcloud.net
majorSource not attested
Last archived state: investigating
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investigating
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 col...
