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.
Zscaler will be performing hardware maintenance in the Kolkata I (CCU1) Datacenter.Maintenance window,Start: 2026-05-06 01:30 ISTEnd: 2026-05-06 03:30 IST(i.e. 2026-05-06 20:00 - 22:00 UTC)During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact. Update - Wed, 06 May 2026 21:11:43 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Tel Aviv II (TLV2) Datacenter Scheduled Maintenance - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Tel Aviv II (TLV2) Datacenter.New Maintenance window, Start: 2026-05-05 01:00 UTC End: 2026-05-05 04:00 UTC (Local Time 2026-05-05 04:00 - 2026-05-05 07:00 Local Time)
ZPA Logging zone Maintenance - zpatwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
We will be performing maintenance activities to add a new Logging Zone in ZPATWO cloud to augment capacity, 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 enrollmen...
Hong Kong III Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
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 May 5, 9:00 am PDT (May 5, 16:00 UTC)End time is May 5, 5:00 pm PDT (May 6, 00:00 UTC)Update 5/5: Extending Maintenance
Helsinki I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Helsinki I (HEL1) Data Center. During the maintenance window the services through HEL1 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 7, 9:00 am PDT (May 7,16:00 UTC)End time is May 7, 2:00 pm PDT (May 7, 21:00 UTC)
Helsinki I Datacenter Scheduled Maintenance - Service Expansion - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Helsinki I (HEL1) 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/zscloud.net/cenrMaintenance Window:Start time is May 7, 9:00 am PDT (May 7, 16:00 UTC)End time is May 7, 2:00 pm PDT...
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 8, 9:00 am PDT (May 8, 16:00 UTC)End time is May 8, 2:00 pm PDT (May 8, 21:00 UTC)
On April 29, 2026, Zscaler was made aware of CVE-2026-31431, a Local Privilege Escalation (LPE) vulnerability affecting Linux kernel versions 4.14 and later. Zscaler has addressed the vulnerability across all its clouds through patching or mitigation. Zscaler Internet Access (ZIA) distributed products are not impacted. Zscaler suggests adhering to the instructions issued by the operating system vendors for any Linux systems and Zscaler products listed below:Zscaler Private Access (ZPA):&...
Zscaler will be enabling IPv6 at our Capetown IV (CPT4) Data Center. During the maintenance window the services through CPT4 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 7, 9:00 am PDT (May 7, 16:00 UTC)End time is May 7, 2:00 pm PDT (May 7, 21:00 UTC)
Zscaler will be enabling IPv6 at our Amsterdam II (AMS2) Data Center. During the maintenance window the services through AMS2 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 6, 10:00 am PDT (May 6, 17:00 UTC)End time is May 6, 3:00 pm PDT (May 6, 22:00 UTC)
