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
London V Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be enabling IPv6 at our London V (LON5) Data Center. During the maintenance window the services through LON5 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 10, 2:00 pm PDT (April 10, 21:00 UTC)End time is April 10, 6:00 pm PDT (April 11, 1:00 UTC)Update 4/8: Maintenance Window Updated
Zscaler is currently investigating reports of issues with its zscaler.net, zscloud.net Cloud. Customers using IdP-initiated authentication may experience login failures.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 changes and additional details will be posted there as they become available.Root Cause - The issue occurred due to a recently enabl...
Munich I Datacenter Scheduled Maintenance – IPv6 Enablement - zscloud.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will perform scheduled maintenance at our Munich I (MUC1) Data Center to complete preparatory work for future IPv6 enablement. During the maintenance window, services through the MUC1 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 April 7, 1:00 pm PDT (April 7, 20:00 UTC)End time is April 7, 6:00 pm PDT (April 8, 1:00 UTC)Update - Tue, 07 Apr 2026 23:41:56 UTCThis activ...
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: 2026-04-12 12:00:00 UTCEnd Time: 2026-04-12 14:00:00 UTC(Datacenter Local Time 2026-04-12 20:00 - 2026-04-12 22:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might ...
Atlanta III (ATL3) Datacenter Network Maintenance - zscaler.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be performing hardware maintenance in the Atlanta III (ATL3) Datacenter.Maintenance window,Start: 2026-4-7 18:00 ESTEnd: 2026-4-7 20:00 EST(i.e. 2026-4-7 22:00 - 2026-4-8 00:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.
Urgent Maintenance on zdxcloud.net - 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 06:15 AM UTC on April 05, 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, 05 Apr ...
ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with the ZDX cloud. Customers may experience a temporary delay in reporting data.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 changes and additional details will be posted there as they become available.Latest Update - Mon, 06 Apr 2026 03:31:53 UTCNo issues have been observed during the monitoring period. We have applied...
ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue impacting connectivity between client connector and ZDX cloud. Customers may experience a temporary delay in reporting data.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 changes and additional details will be posted there as they become available.Root cause: A service component within the ZDX cloud was unable to process u...
Private Service Edge (PSE) – Intermittent Traffic Blocking for Explicit Proxy Traffic - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler is aware of and actively investigating an issue impacting a subset of customers using Private Service Edge (PSE). Some customers are experiencing intermittent traffic blocking when accessing websites through PSE. Affected requests may return the error: "Web Application Blocked by Firewall Rule."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 cha...
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Saturday at 05:45 AM Pacific Time on April 04, 2026 (Saturday, April 04, 2026 12:45 PM UTC), and can take up to 2 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questi...
