Posted on: Sun, 14 Dec 2025 23:48:43 UTC
Resolved on: Mon, 15 Dec 2025 01:36:15 UTC
Impact Start Time: Sun, 14 Dec 2025 23:48:35 UTC
Impact Remediated: Mon, 15 Dec 2025 01:15:36 UTC
DNS Resolution Issue
Customer Impact: Customers may experiencing failures with PAC files that use the host variable. This results in Zscaler Client Connector (ZCC) being unable to resolve the proxy hostname, causing traffic disruption.
Available Workaround: Customers may update their PAC file as a temporary measure until the fix is released.
Services affected: Authentication
Status: Resolved
Event Type: Service Degradation

Zscaler has detected an issue on its zscaler.net, zscloud.net Cloud. Customers may experiencing failures with PAC files that use the host variable. This results in Zscaler Client Connector (ZCC) being unable to resolve the proxy hostname, causing traffic disruption.

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.

Update - Mon, 15 Dec 2025 00:02:03 UTC

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

Update - Mon, 15 Dec 2025 01:36:15 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.


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