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
RI DC Test - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its Atlanta 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 chang...
Chicago I (CHI1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscalerthree.net, zpabeta.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Chicago I (CHI1) Datacenter Datacenter.Scheduled Maintenance window, Start: 2026-05-15 23:00 UTC End: 2026-05-16 01:00 UTC (Local Time 2026-05-15 18:00 - 2026-05-15 20:00)
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 Thursday at 03:00 AM UTC on 14th May, 2026, and can take up to 2 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 - Thu, 14 Ma...
London III (LON3) Datacenter Network Maintenance - zscaler.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the London III (LON3) Datacenter.Maintenance window,Start: 2026-05-14 20:30 BSTEnd: 2026-05-14 23:30 BST(i.e. 2026-05-14 19:30 - 22:30 UTC)Update - Thu, 14 May 2026 21:54:47 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Datacenter Maintenance - private.zscaler.com
minorSource not attested
Last archived state: resolved
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resolved
Zscaler is performing proactive emergency maintenance activity for data centers across Geo regions.Users may observe very brief disconnect and reconnect to ZPA cloud during the maintenance activity. Update - Wed, 13 May 2026 14:50:30 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Duplicate User Activity Logs Observed in SIEM LSS - private.zscaler.com, zpatwo.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler is investigating an issue impacting a subset of customers using SIEM Log Streaming Service (LSS), where duplicate User Activity log entries may be observed within streamed payloads. Customers may experience increased SIEM log ingestion volume. There is no impact to inline traffic processing, policy enforcement, or overall service availability.Zscaler teams are actively investigating the issue and evaluating mitigation options. For detailed updates, please check the Service Status sect...
Connectivity Issues Affecting India Data Centers - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
We are currently investigating a connectivity issue impacting traffic between India and certain European destinations, primarily the UK. Customers may experience intermittent performance degradation affecting international traffic originating from the following Zscaler data centers: Chennai II, Hyderabad I, Kolkata I, Mumbai VI, and Mumbai VII. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, ...
Singapore IV (SIN4) Datacenter Network Maintenance - zscloud.net, zscalerthree.net, zdxcloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in the Singapore IV (SIN4) Datacenter.Maintenance window,Start: 2026-05-15 11:00 UTCEnd: 2026-05-15 13:00 UTC(Local Time 2026-05-15 19:00 - 21:00)
Zscaler will be performing hardware maintenance in the Zurich I (ZRH1) Datacenter.Maintenance window,Start: 2026-05-13 19:00 CESTEnd: 2026-05-13 23:00 CEST(i.e. 2026-05-13 17:00 - 21:00 UTC)During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.Update - Wed, 13 May 2026 23:50:32 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Zscaler will be enabling IPv6 at our Copenhagen II (CPH2) Data Center. During the maintenance window the services through CPH2 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 15, 9:00 am PDT (May 15, 16:00 UTC)End time is May 15, 2:00 pm PDT (May 15, 21:00 UTC)
