Zscaler outage history and live incidents

Update - Wed, 21 Oct 2026 20:11:34 UTC

Zscaler is investigating an issue affecting new device registration, enrollment, and user login through Zscaler Client Connector on Windows devices running version 4.4 or earlier and macOS devices running version 4.5.0 or earlier. Affected users may encounter "Unsupported" or "Internal Error" messages. While Zscaler works to restore service, affected customers can upgrade Zscaler Client Connector to the latest supported version as a workaround. Further updates will be provided as more information becomes available.

Update - Wed, 21 Oct 2026 20:27:45 UTC

We have identified the root cause of the issue and working on resolution.

Update - Wed, 21 Oct 2026 20:31:39 UTC

Zscaler has implemented a mitigation, and initial customer feedback indicates that service has been restored. Affected users are requested to re-enroll their devices in Zscaler Client Connector. Zscaler continues to monitor service stability and recommends upgrading to a supported Zscaler Client Connector version rather than continuing to use an outdated version.

Update - Thu, 22 Oct 2026 00:23:02 UTC

Following the mitigation implemented by Zscaler, service has been restored and the incident is resolved. Zscaler continues to monitor service stability.

Update - Tue, 20 Oct 2026 23:20:49 UTC

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.

Update - Tue, 20 Oct 2026 11:29:31 UTC

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.

Update - Tue, 20 Oct 2026 15:00:20 UTC

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.

Update - Tue, 20 Oct 2026 10:34:43 UTC

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.

Update - Tue, 20 Oct 2026 14:14:19 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 21 Oct 2026 05:48:28 UTC

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.

Update - Wed, 21 Oct 2026 19:07:39 UTC

Zscaler continues to monitor the service following the mitigation actions implemented earlier. While the issue is not yet fully resolved, we are closely monitoring the environment and actively working toward full restoration. We will provide additional updates as more information becomes available.

Update - Fri, 23 Oct 2026 02:29:03 UTC

Zscaler continues to monitor service performance in the zscloud.net cloud following mitigation. Recent monitoring indicates improved performance. We remain focused on sustained recovery and continue to work toward full resolution. Further updates will be provided as more information becomes available.

Update - Tue, 20 Oct 2026 02:53:06 UTC

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.

Update - Tue, 06 Oct 2026 21:30:28 UTC

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.

Update - Wed, 07 Oct 2026 21:13:54 UTC

Zscaler is validating the fix and will deploy it once validation is complete. Further updates will be shared as more information becomes available.

Update - Mon, 12 Oct 2026 21:33:21 UTC

Zscaler is continuing to validate the fix and will proceed with deployment once validation is complete. We will provide additional updates as more information becomes available.

Update - Fri, 23 Oct 2026 16:33:40 UTC

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.