Zscaler has detected an issue impacting the private.zscaler.com Cloud in the US region (US3 Logging zone). A subset of customers in the impacted environments may observe the following:

• Diagnostics dashboards may show incomplete / partial data.
• Alerts tied to these components may trigger false positives.
• Nanolog-enabled dashboards may experience intermittent timeouts.

Note: Customers that in US1, US2, US4, US5 logging zone in the US region will see no impact.

There is no impact to live traffic. ZCC enrollment and ZPA logins remain fully functional, and all production services continue to operate normally.

We will continue to publish updates here as the investigation progresses. Additional details — including status changes — will be shared as they become available.

Zscaler has isolated the underlying cause affecting telemetry visibility within the impacted cloud. Mitigation work is in progress to restore complete dashboard data fidelity. We will continue to publish updates here as mitigation progresses or as additional material information becomes available.

Update - Wed, 05 Nov 2025 22:29:41 UTC

Zscaler has implemented the required mitigation steps across the impacted environments. Two of the affected environments are already restored, and the final environment is actively progressing mitigation. Zscaler is monitoring closely to ensure stability and sustained service availability.

Update - Thu, 06 Nov 2025 14:25:52 UTC