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.
August 2026
Announcing withdrawal of select Linux Client Connector Debian packages - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net
Source not attested
Last archived state: investigating
View archived record details
investigating
It was discovered recently that the expiry of a package-signing key was causing a recent set of Debian-based packages for certain Linux Client Connector versions to reject Zscaler package updates. As a result, any of the Debian installations for the Linux Client Connector versions listed below will not receive automatic upgrades of new versions starting with 4.2.2. Once that key expired, clients began treating package signatures as invalid, even for packages that were signed successfully ...
Precautionary Trust for Zscaler India Data Center Traffic Testing - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Dear Zscaler Customer,This is a precautionary trust for Zscaler's BOM6/BOM7/CCU1/DEL1/HYD1/MAA2/MAA3 data centers to test international carrier traffic optimization during a major subsea cable fault. Maintenance window,Start: 2026-08-15 00:0:00 ISTEnd: 2026-08-15 04:00 IST(i.e. 2026-08-14 18:30 - 22:30 UTC)Minimal to no service impact is expected. Update - Fri, 14 Aug 2026 22:23:10 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Planned Upgrade to Experience Center | Action Required for Eligible Customers - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zpabeta.net, zslogin.net
partialSource not attested
Last archived state: investigating
View archived record details
investigating
Starting Sep 6, a subset of Zscaler customers are scheduled for an automatic upgrade to Experience Center, a unified console for managing Zscaler products, policies, and security analytics. This has been communicated through emails and in-product banners to this cohort.Recommended: Self-initiate the upgrade before Sep 6 to avoid disruption. Contact your Zscaler Account team or Zscaler Support to upgrade on your preferred schedule.What changes after automatic upgrade: Legacy IdP admin access ...
Intermittent Source Run Failures - app.avalor.io, app.eu.avalor.io, app.aps.avalor.io
partialSource not attested
Last archived state: investigating
View archived record details
investigating
We identified an issue that caused some source runs to fail during a limited time window. This impacted only sources that executed during the incident period.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 platform issue in the shared ingestion workflow caused som...
Los Angeles I Datacenter Scheduled Maintenance - zscalertwo.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in Los Angeles I (QLA1) Datacenter.Maintenance window: Start: 2026-08-13 02:00 UTC End: 2026-08-13 04:00 UTC (Local Time 2026-08-12 19:00 - 2026-08-12 21:00)Update - Thu, 13 Aug 2026 04:23:30 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
London III (LON3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the London III (LON3) Datacenter.Maintenance window,Start: 2026-08-12 21:00 BSTEnd: 2026-08-12 23:00 BST(i.e. 2026-08-12 20:00 - 22:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.Update - Wed, 12 Aug 2026 21:58:26 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
New York III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be enabling IPv6 at our New York III (NYC3) Data Center. During the maintenance window the services through NYC3 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 August 13, 3:00 pm PDT (August 13, 22:00 UTC)End time is August 13, 9:00 pm PDT (August 14, 4:00 UTC)Update - Fri, 14 Aug 2026 03:55:24 UTCThis activity has been completed. Please contact Zs...
Milan IV Data Center Online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Dear Zscaler Customer,You are receiving this notice in accordance with the Zscaler Service Continuity Policy.As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Milan IV (MIL4) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on August 11, 2026What if I have more questions? Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I pa...
Intermittent Login Failures for claude.ai - zscaler.net, zscloud.net
partialSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its zscaler.net, zscloud.net Cloud. Customers with an HTTP/2 Header Profile applied via a URL Control Policy may experience intermittent login failures when accessing claude.ai. The HTTP/2 profile disrupts the authentication flow, which may prevent login from completing successfully. All other traffic forwarding and policy enforcement remain unaffected.We will continue to provide updates here as the investigation progresses. For detailed updates, please...
URL Category Classification Issue - zscaler.net
Source not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with its zscaler.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: This issue occurred due to a recent service update to the AI/ML content categorization model.Latest Update - Mon, 10 Aug 2026 09:37:00 UTCZscaler has confirmed ...
