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Outage in Zscaler

New Delhi I and Mumbai VI Data center Issue

Minor
June 05, 2026 - Started 3 days ago

Incident Report

Zscaler has detected an issue with our New Delhi I (ZSN) and Mumbai VI (ZS3) data centers and is currently investigating the matter.  Customers may encounter disconnections, periods of slowness or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. 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.Latest Update - Mon, 08 Jun 2026 21:17:39 UTCZscaler has identified a software defect that may be contributing to the observed behavior and is currently validating a corrective update. As part of this validation effort, a limited deployment is being planned while teams continue to monitor service health and assess impact. We will provide additional updates as more information becomes available.Update - Fri, 05 Jun 2026 15:19:22 UTCZscaler 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 - Fri, 05 Jun 2026 18:47:27 UTCZscaler teams are actively working to identify the cause and apply mitigation as needed. We will provide additional updates as soon as more information becomes availableUpdate - Fri, 05 Jun 2026 23:09:55 UTCZscaler has identified conditions contributing to this issue and continues to investigate to validate findings and determine any additional contributing factors. Current monitoring indicates that the behavior remains intermittent in nature. Zscaler teams continue to assess the identified conditions and evaluate corrective actions as needed. We will continue to provide updates as more information becomes available.Update - Mon, 08 Jun 2026 12:12:13 UTCZscaler 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 - Mon, 08 Jun 2026 13:46:58 UTCThe incident title and the impacted data center and cloud details have been updated to include the Mumbai VI data center on zscalerthree.net as well. Zscaler is treating this issue with high priority and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding while the investigation is ongoing. Additional updates will be provided as more information becomes available.Update - Mon, 08 Jun 2026 21:17:39 UTCZscaler has identified a software defect that may be contributing to the observed behavior and is currently validating a corrective update. As part of this validation effort, a limited deployment is being planned while teams continue to monitor service health and assess impact. We will provide additional updates as more information becomes available.

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