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.
July 2026
Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on July 2nd, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes. Update - Thu, 02 Jul 2026 05:40:37 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
End-of-life for ZscalerOS 24 - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Dear Zscaler Customer,In accordance with our End-of-Life (EOL) policy, Zscaler is formally announcing the EOL of ZscalerOS 24 (ZSOS24) effective December 31, 2026.To ensure continuous security updates and the latest features, all virtual appliances must transition to ZscalerOS 42 (ZSOS42).For the Vast Majority of Customers (No Action Required):Zscaler has already migrated, or will soon migrate, your ZSOS24 virtual appliances to ZSOS42. If your appliances are eligible for migration, no manua...
Addition to Zscaler Hub IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on July 1, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after August 30, 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 disruptio...
Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Dear Zscaler Customer,In accordance with Zscaler Service Continuity Policy and per email notification sent on July 1, 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 30, 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 di...
Intermittent DNS Resolution Failures for Wildcard Domains - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
partialSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud. Some customers may experience intermittent DNS resolution failures on both Private Service Edge and Public Service Edge.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.Lates...
RHEL 9.x Boot Issue Impacting ZPA Components During OS Upgrades - private.zscaler.com, zpatwo.net, zpabeta.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is aware of a boot-related issue affecting Red Hat Enterprise Linux (RHEL) 9.x that can impact ZPA infrastructure components, and to share the steps we are taking to protect your environment.A recent Red Hat update (RHBA-2026:18665, released with RHEL 9.x on May 19, 2026) increased the size of a core system boot file. On the affected components, this larger file can exceed the space available in the system's boot partition, which may prevent the component from starting up properly. It...
June 2026
Removal of Custom IP-Based Application Bypass feature from iOS App Profiles in Experience Center and Client Connector Admin Port - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has removed the Custom IP-Based Application Bypass feature dropdown in iOS App Profiles as the feature isn’t supported by Zscaler Client Connector on iOS devices at this time. Custom IP-Based Application Bypasses are a list of destination IP addresses, subnets, ports and protocols used by specific applications and can be selected in App Profiles to bypass traffic for a specific application when Z-Tunnel 2.0 is used for traffic forwarding.The Custom IP-Based Application Bypass featur...
Reminder Notification for Upcoming New DCs and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Dear Customer, In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on May 15, 2026, we would like to remind you of the upcoming New DCs and expansions at the locations listed below. These would be available anytime on or after July 14, 2026.Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.RegionLocationCIDRNotesAmericasToronto III13...
San Francisco IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be enabling IPv6 at our San Francisco IV (SJC4) Data Center. During the maintenance window the services through SJC4 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 June 30, 6:00 pm PDT (July 1, 1:00 UTC)End time is June 30, 11:00 pm PDT (July 1, 6:00 UTC)Update - Wed, 01 Jul 2026 07:12:31 UTCThis activity has been completed. Please contact Zscaler ...
Reporting and Logging Issue - zscalertwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its zscalertwo.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 issue occurred due to an internal service processing disruption.Latest Update - Sat, 27 Jun 2026 12:05:30 UTCFollowing the actions previously taken by Zs...
