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
Los Angeles 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 Los Angeles II (QLA2) Data Center. During the maintenance window the services through QLA2 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 5, 6:00 pm PDT (May 6, 1:00 UTC)End time is May 5, 11:00 pm PDT (May 6, 6:00 UTC)
Zscaler will be enabling IPv6 at our Hyderabad I (HYD1) Data Center. During the maintenance window the services through HYD1 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 4, 9:00 am PDT (May 4, 16:00 UTC)End time is May 4, 2:00 pm PDT (May 4, 21:00 UTC)
Los Angeles I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Los Angeles I (QLA1) Data Center. During the maintenance window the services through QLA1 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 4, 9:00 pm PDT (May 5, 4:00 UTC)End time is May 5, 3:00 am PDT (May 5, 10:00 UTC)
Manchester I (MAN1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in the Manchester I (MAN1) Datacenter.Maintenance window,Start: 2026-05-06 23:00 BSTEnd: 2026-05-07 03:00 BST(i.e. 2026-05-06 22:00 - 2026-05-07 02:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.
Hong Kong III Datacenter Scheduled Maintenance – IPv6 Enablement - zscalertwo.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will perform scheduled maintenance at our Hong Kong III (HKG3) Data Center to complete preparatory work for future IPv6 enablement. During the maintenance window, services through the HKG3 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 May 1, 9:00 am PDT (May 1, 16:00 UTC)End time is May 1 2:00 pm PDT (May 1, 21:00 UTC)
Cellular Portal Migration to Experience Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zslogin.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler Cellular Portal is Being disabled—Move to Experience Center by May 15, 2026What is changing?Effective May 15, 2026, Zscaler is disabling the Zscaler Cellular Portal at https://admin.ztsim.com. After this date, the Zscaler Cellular Portal will no longer be available for managing or monitoring Zscaler Cellular services.To continue administering and gaining visibility into Zscaler Cellular services, customers must use Zscaler Experience Center at https://console.zsc...
Tokyo IV Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Tokyo IV (TYO4) 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 DCFor more information, please visit:https://config.zscaler.com/zscalerthree.net/cenrMaintenance Window:Start time is May 1, 8:00 am PDT (May 1,15:00 UTC)End time is May 1, 2:00 pm P...
Tokyo V Datacenter Scheduled Maintenance - Service Expansion - zscaler.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be expanding its global data center footprint and performing 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 DCFor more information, please visit:https://config.zscaler.com/zscaler.net/cenrhttps://config.zscaler.com/zscalerthree.net/cenrMaintenance Window:Start time is May 1, 8:00 am PDT (Ma...
Tokyo V Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be enabling IPv6 at our Tokyo V (TYO5) Data Center. During the maintenance window the services through TYO5 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 1, 8:00 pm PDT (May 1,15:00 UTC)End time is May 1, 2:00 pm PDT (May 1, 21:00 UTC)
New Delhi I Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscloud.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be enabling IPv6 at our New Delhi I (DEL1) Data Center. During the maintenance window the services through DEL1 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 1, 9:00 am PDT (May 1, 16:00 UTC)End time is May 1, 2:00 pm PDT (May 1, 21:00 UTC)
