Shanghai, Shanghai II and Beijing III Datacenter Issue

Zscaler has detected an issue with its Shanghai, Shanghai II, and Beijing III datacenters and is currently investigating the matter. 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 - Thu, 05 Feb 2026 16:26:00 UTCZscaler continues to work with our carrier partner. At this time, there is no new update to share regarding the congestion/submarine cable repairs, and we will continue to follow up with the carrier. Where possible, customers may also work with their ISP/carrier to explore rerouting options to bypass the impacted path and associated congestion while repairs are in progress.Update - Mon, 02 Feb 2026 03:40:08 UTCZscaler has identified issue with its carrier partner and working to the resolve the issue. Updated will be shared as they become available.Update - Mon, 02 Feb 2026 07:28:48 UTCZscaler continues to work with its carrier partner to expedite resolution, and additional updates will be provided as they become available.Update - Mon, 02 Feb 2026 12:15:44 UTCZscaler continues to work with its carrier partner to expedite resolution and will share further updates as they become available.Update - Mon, 02 Feb 2026 16:27:35 UTCZscaler has received confirmation from its carrier partner that the issue is due to congestion along the network path related to subsea cable impacts. Zscaler continues to work with the partner to investigate and implement any potential mitigations.Update - Tue, 03 Feb 2026 04:17:01 UTCZscaler has not received new updates from its carrier partner. The ongoing submarine cable repairs are outside of Zscaler’s and the partner’s control; therefore, no estimated time to restoration (ETR) is available at this time. Further updates will be shared as they become available.Update - Tue, 03 Feb 2026 07:44:57 UTCZscaler has still not received any new updates from its carrier partner. The ongoing submarine cable repairs remain outside of Zscaler’s and the partner’s control; therefore, an estimated time to restoration (ETR) is not available at this time. As the investigation continues, we have expanded the list of impacted data centers and extended the impact details based on the latest findings. We will share further updates as soon as new information becomes available.Update - Thu, 05 Feb 2026 16:26:00 UTCZscaler continues to work with our carrier partner. At this time, there is no new update to share regarding the congestion/submarine cable repairs, and we will continue to follow up with the carrier. Where possible, customers may also work with their ISP/carrier to explore rerouting options to bypass the impacted path and associated congestion while repairs are in progress.