Posted on: Tue, 11 Nov 2025 05:21:04 UTC
Resolved on: Tue, 11 Nov 2025 11:28:46 UTC
Impact Start Time: Mon, 10 Nov 2025 09:14:00 UTC
Impact Remediated: Tue, 11 Nov 2025 09:10:00 UTC
Chennai II, Chennai III, Singapore IV, Singapore V datacenter issue
Customer Impact: Due to an issue with URL categorization, websites are being miscategorized. This mis categorization is leading to disruptions in policy enforcement that may impact user access.
Datacenters affected: APAC, Singapore IV, Chennai II, Singapore V, Chennai III
Status: Resolved
Event Type: Service Degradation

Zscaler is investigating an issue affecting URL categorization in our Chennai II, Chennai III, Singapore IV, and Singapore V datacenters. This issue may lead to miscategorization of websites, potentially resulting in  websites being incorrectly blocked. 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."

Incident status- Resolved

Root cause- The issue stems from a recent database update applied to a subset of our data centers.

Update - Tue, 11 Nov 2025 09:01:26 UTC

The database update has been successfully reverted, and proper URL categorization functionality is now restored. This incident is now resolved.

Update - Tue, 11 Nov 2025 08:48:46 UTC

The issue stems from a recent database update applied to a subset of our data centers. We have identified this specific update and are now actively rolling back these changes to restore the services.

Update - Tue, 11 Nov 2025 07:33:49 UTC

Zscaler remains committed to resolving this issue. We appreciate your ongoing patience and understanding during this process and will provide further updates as new information becomes available.

Update - Tue, 11 Nov 2025 06:01:20 UTC

The Zscaler team has identified the issue related to a recent change and is actively prioritizing the incident, exploring various mitigation options, and working to restore services.