Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved.
Root Cause: Preliminary root cause is attributed to an internal backend infrastructure issue, which has since been fully resolved.
Following the actions previously taken by Zscaler, the incident has been resolved.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Services have recovered following remediation of a network configuration issue by our infrastructure partner. We are continuing to monitor the environment to ensure stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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.
Tokyo IV and Tokyo V Data Center Issue - zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
The performance issue has been resolved. The degradation was observed between 0800–1000 Japan time following resumption of business activity post a holiday period, and recovered without any intervention. The environment is confirmed stable.
Legacy Incident Archive
453 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the Oceania region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 2:00 AM Pacific Time on Apr 18, 2026 (Saturday, Apr 18, 2026 09:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available a...
Zscaler is currently aware of a performance degradation affecting case creation, associated with a third-party service provider. At this time, core Zscaler services, including the data plane and control plane, continue to operate normally. We are actively collaborating with the impacted service provider, who has acknowledged the issue within their managed infrastructure and is working toward resolution. The service provider has identified the underlying cause and initiated remediation actions...
Zscaler is currently investigating reports of issues with the administration UI on its Cloud. Some customers may be unable to create a new Certificate Signing Request (CSR) because the option is greyed out. 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 - We...
Administration UI Issue - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with the administration UI on its zscloud.net Cloud. Customers may encounter slowness issues logging into Administration UI and Zscaler Client Connector portal.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.Root Cause- A surge in authenticat...
Zscaler will be performing hardware maintenance in the Brussels II (BRU2) Datacenter.Maintenance window,Start: 2026-04-17 21:00 CESTEnd: 2026-04-17 23:00 CEST(i.e. 2026-04-17 19:00 - 21:00 UTC)During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.
ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with Reporting and Logging on its zdxcloud.net Cloud. Customers may experience a temporary delay in reporting data.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.Root cause- The incident was caused by a performance bottleneck within our backend sy...
User Authentication Issues - zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an user authentication issue on its zscalerthree.net Cloud. Customer might experience issues with user authentication services, impacting Zscaler Client Connector (ZCC) login, web traffic authentication and Zscaler Client Connector portal.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 pos...
Administration UI and User Authentication Issues - zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its zscalerthree.net Cloud. 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.Root Cause: The preliminary root cause of this issue is attributed to a fault in the control plane.Update - Sat, 11 Apr 2026 02:37:12 UTCZscaler observed an issue affe...
Munich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Munich I (MUC1) Data Center. During the maintenance window the services through MUC1 Data Center will be restarted in phases to minimize the service impact.Other Zscaler sites and Zscaler Services will continue to operate normally.Maintenance Window:Start time is April 14, 1:30 pm PDT (April 14, 20:30 UTC)End time is April 14, 6:00 pm PDT (April 15, 1:00 UTC)
Scheduled Maintenance Extended - EMEA Region - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region data centers on zscaler.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.Update - Sat, 11 Apr 2026 01:02:06 UTCThis activity has b...
