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Zscaler Outage History

Daily provider-status observations and published incident history for Zscaler.

Degraded performance

Zscaler is reporting degraded performance. Verified . Official provider source.

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14.3% of 28 verified observed days had no reported provider issue

90-Day Trend

Jul 22Oct 20

Dashed calendar markers below identify legacy observations whose source-at-observation was not recorded.

Recorded Daily Status (Last 62 Days)

Jul 22 Today
Legacy observation Operational Degraded Partial Outage Major Outage Maintenance No Data

Incident History

October 2026
Experience Center Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net
minor

View incident details and source

Notice published:

investigating
Zscaler is prioritizing the issue and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.
Administration UI Issue - zscloud.net
minor

View incident details and source

Notice published:

investigating
Zscaler is prioritizing the issue and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.
Audit Logs Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
minor

View incident details and source

Notice published:

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.
Zscaler Admin Console issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zslogin.net
major

View incident details and source

Notice published:

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
minor

View incident details and source

Notice published:

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
minor

View incident details and source

Notice published:

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
minor

View incident details and source

Notice published:

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.
Cloud NSS Issue - zscaler.net, zscloud.net
major

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Notice published:

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.
Reporting and Logging Issue - zscalertwo.net
minor

View incident details and source

Notice published:

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.
ZCC Flow Logging Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
minor

View incident details and source

Notice published:

investigating
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.

March 2026
Scheduled Maintenance on AMER region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major Source not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the AMER region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 PM Pacific Time on Mar 14, 2026 (Sunday, Mar 15, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after ...
Scheduled Maintenance on APAC region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major Source not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the APAC region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 AM Pacific Time on Mar 14, 2026 (Saturday, Mar 14, 2026 01:00 PM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available afte...
Scheduled Maintenance on EMEA region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major Source not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the EMEA region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 6:00 PM Pacific Time on Mar 13, 2026 (Saturday, Mar 14, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after ...