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.
June 2026
Urgent Maintenance on AMER Region - zscaler.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscaler.net cloud. This maintenance 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 after maintenance is complete. Please contact Zscaler Support if you have additional questions.
Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
Source not attested
Last archived state: investigating
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investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on June 15, 2026, we would like to notify you of the upcoming data center expansions at the locations listed below. These would be available anytime on or after August 14, 2026; 60 days or more from the date the first email notification is sent.Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service d...
Intermittent Connectivity Issues Impacting a Subset of Destinations - zscaler.net, zscloud.net
partialSource not attested
Last archived state: investigating
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investigating
Zscaler is investigating an issue that may affect connectivity when accessing a subset of destinations. Based on our current assessment, impacted customers may experience application access failures, connection timeouts, and website reachability issues. The impact is intermittent and may vary depending on the service path used to process individual user sessions, including traffic traversing Public Service Edge and Private Service Edge infrastructure.Our teams are actively investigating to de...
Scheduled Maintenance Extended - zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.
ZPA Performance issues - private.zscaler.com
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its private.zscaler.com Cloud. We are currently investigating period of slowness, latency or connection timeouts while accessing ZPA Applications.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: Elevated DNS traffic conditions resul...
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Thursday at 8:00 PM Pacific Time on June 11, 2026 (Friday, June 12, 2026 03:00 AM UTC), and can take up to 3 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.
Administration UI Issue - zscaler.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with the administration UI on its zscaler.net Cloud. We are investigating periods of slowness, connection timeouts and/or increased latency. 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: Temporary performance degradation in the Admin...
Urgent Maintenance on Chicago, New York, Dallas, Atlanta, Washington datacenters - zscaler.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Chicago, New York, Dallas, Atlanta, Washington datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 09:00 PM Pacific Time on June 11, 2026 (Friday, June 12, 2026 4:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please con...
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the London, Frankfurt, Manchester, Amsterdam, Zurich datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 01:00 PM Pacific Time on June 11, 2026 (Thursday, June 11, 2026 08:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Pleas...
Zurich I (ZRH1) Datacenter Network Maintenance - zdxcloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the Zurich I (ZRH1) Datacenter.Maintenance window,Start: 2026-06-10 18:00 CESTEnd: 2026-06-10 22:00 CEST(i.e. 2026-06-10 16:00 - 20:00 UTC)During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact. [UPDATE: Extending trust an additional two hours]Update - Wed, 10 Jun 2026 18:43:03 UTCThis activity has been completed. Please contact Zscaler Support if you have additional ques...
