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's monitoring confirms that the environment has remained stable following the mitigation. Continued monitoring is in place to ensure sustained stability and prevent recurrence.
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.
May 2026
Dallas II 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 Dallas II (DFW2) Data Center. During the maintenance window the services through DFW2 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 May 14, 6:00 pm PDT (May 15, 1:00 UTC)End time is May 14, 11:00 pm PDT (May 15, 6:00 UTC)
Zscaler will be enabling IPv6 at our Frankfurt IV (FRA4) Data Center. During the maintenance window the services through FRA4 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 May 13, 9:00 am PDT (May 13, 16:00 UTC)End time is May 13, 4:00 pm PDT (May 13, 23:00 UTC)Update - Wed, 13 May 2026 23:19:31 UTCThis activity has been completed. Please contact Zscaler Suppo...
Zscaler will be enabling IPv6 at our Dallas I (DFW1) Data Center. During the maintenance window the services through DFW1 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 May 12, 6:00 pm PDT (May 13, 1:00 UTC)End time is May 12, 12:00 pm PDT (May 13, 7:00 UTC)Update - Wed, 13 May 2026 07:13:20 UTCThis activity has been completed. Please contact Zscaler Support if...
Perth I (PER1) Datacenter Network Maintenance - zscalertwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Perth I (PER1) Datacenter.Maintenance window: Start: 2026-05-12 12:00 UTC End: 2026-05-12 15:00 UTC (Local Time 2026-05-12 20:00 - 2026-05-12 23:00 AWST)Update - Tue, 12 May 2026 14:00:37 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Atlanta III (ATL3) Datacenter Network Maintenance - zscalertwo.net, private.zscaler.com
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Atlanta III (ATL3) Datacenter.Scheduled Maintenance window, Start: 2026-05-14 02:00 UTC End: 2026-05-14 06:00 UTC (Local Time 2026-05-13 22:00 - 2026-05-14 02:00)
User Authentication Issue on Beijing III and Shanghai II datacenter - zscaler.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with its Beijing III, Shanghai 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)....
China Premium Access Plus Beijing Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
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: 2026-05-27 20:00:00 UTCEnd Time: 2026-05-27 21:00:00 UTC(Datacenter Local Time 2026-05-28 04:00 - 2026-05-28 05:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might be observed during t...
China Premium Access Plus Beijing Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
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: 2026-05-14 16:00:00 UTCEnd Time: 2026-05-14 17:00:00 UTC(Datacenter Local Time 2026-05-15 00:00 - 2026-05-15 01:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might be observed during t...
Urgent Maintenance - zdxcloud.net
majorSource not attested
Last archived state: investigating
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investigating
The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Sunday at 03:05 AM UTC on 10th May, 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, 10 May ...
Urgent Maintenance - zdxcloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Saturday at 03:30 AM UTC on 9th May, 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 - Sat, 09 May...
