Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler teams have successfully deployed the fix during the planned maintenance window. Post-deployment sanity validation has been completed with successful results, and the service remains stable.
Increased CAPTCHA Challenges During Web Access - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
The increased Google CAPTCHA activity has subsided, and this incident is resolved. The investigation linked the repeated challenges to Google’s automated traffic detection. No contributing changes to Zscaler services were identified. A subset of users experienced repeated CAPTCHA prompts when accessing Google services or websites using Google CAPTCHA, interrupting searches and related workflows. Customers who continue to encounter Google CAPTCHA prompts should review Avoiding Google CAPTCHA...
Miami III, Miami IV Datacenter Issue - zscalertwo.net, zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Zscaler has isolated the connectivity degradation affecting Miami III and Miami IV to congestion on external ISP network paths. Corrective action is required from the relevant service provider. This incident notification is now closed. Customers experiencing continued impact should contact their ISP to request path optimization. Connecting through an alternate data center may help mitigate the impact; please validate connectivity after failover. Contact Zscaler Support if further assistance i...
Intermittent Connectivity Issues Affecting Plain UDP Tunnels for Branch Connectors and Cloud Connectors in APAC - zscloud.net
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
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
Zscaler has completed post-deployment monitoring and confirmed that all affected services are functioning as expected. Based on continued stability and healthy service checks, we are marking this incident as 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.
update
We are receiving positive feedback from multiple customers indicating service recovery. Our teams continue to closely monitor services and will provide further updates as more information becomes available.
update
We have reverted the contributing configuration change and implemented additional adjustments to improve service capacity on ZS2. We are currently validating these changes and monitoring recovery for Zscaler Client Connector sign-in/registration and Mobile Admin Portal access. We will provide another update as validation completes or if service status changes.
update
We are continuing to investigate an issue impacting Zscaler Client Connector sign-in/registration and access to the Mobile Admin Portal for a subset of users on ZS2. Initial mitigation actions did not fully restore service. We identified a contributing configuration change that reduced service capacity for the Mobile Admin Portal on ZS2, which led to intermittent access issues for some users. Our teams are reverting the change and actively applying additional remediation steps to recover affected services. We are monitoring recovery and will provide further updates as more information becomes available.
update
We are investigating an issue impacting Zscaler Client Connector sign-in/registration and access to the Mobile Admin Portal for a subset of users on ZS2. Mitigation actions have been applied and we are now monitoring the service. We will provide another update as more information becomes available.
update
We have identified the root cause of the issue and working on resolution.
update
Zscaler has detected an Authentication issue with the Zscaler Client Connector Portal and Zscaler Client Connector (ZCC) on its zscalertwo.net Cloud. Some users may see a “Zscaler Client Connector was unable to enroll at this time” message when trying to sign in to Zscaler Client Connector (ZCC). Users who are already signed in should continue to access services normally.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.
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
New Delhi I Datacenter Issue - 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
Zscaler is currently investigating reports of an issue with its New Delhi I datacenter. Customers may encounter disconnections, periods of slowness or increased latency. 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 s...
Administration UI and User Authentication Issues - zscalerthree.net
Source not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with the administration UI and user authentication on 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: Primary CA was recoveredLatest Update - Fri, 26 Jun 2026 11:15:59 UTCFollowing the actions previously tak...
Oslo III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be enabling IPv6 at our Oslo III (OSL3) Data Center. During the maintenance window the services through OSL3 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 29, 9:00 am PDT (June 29, 16:00 UTC)End time is June 29, 2:00 pm PDT (June 29, 21:00 UTC)Update - Mon, 29 Jun 2026 20:50:55 UTCThis activity has been completed. Please contact Zscaler Suppo...
Scheduled Maintenance Extended - APAC Region - zscalerthree.net
minorSource not attested
Last archived state: resolved
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resolved
The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the APAC region's datacenters on zscalerthree.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.
Connectivity Issues Affecting India Data Centers - 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
Zscaler has detected an issue with its Chennai II, Chennai III, Hyderabad I, Mumbai VI, Mumbai VII, New Delhi I datacenter and is currently investigating the matter. We are investigating periods of slowness, connection timeouts and/or increased latency. 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 t...
Warsaw II (WAW2) Datacenter Issue - zscaler.net, zscloud.net
Source not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with its Warsaw II (WAW2) datacenter and is currently investigating the matter. Customers may encounter disconnections, periods of slowness or increased latency. 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 chec...
Vancouver I Datacenter Issue - zscalertwo.net
Source not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with our Vancouver I datacenter 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 chan...
ZPA Diagnostic logs Issue - private.zscaler.com
Source not attested
Last archived state: investigating
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investigating
Zscaler is currently investigating reports of issues with its private.zscaler.com 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: Issue occurred due to an internal processing issueLatest Update - Wed, 24 Jun 2026 03:45:28 UTCFollowing the actions previously t...
Intermittent 403 Errors - zslogin.net
partialSource not attested
Last archived state: investigating
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investigating
Zscaler has detected an issue with its zslogin.net Cloud. Customers may experience intermittent 403 errors when attempting to access zslogin.net. 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 fix was deployed to restore stability following a software defect.Lat...
Authentication Errors Affecting Zscaler Client Connector (ZCC) API Requests via the Authentication Service - zscalertwo.net, zscalerthree.net
partialSource not attested
Last archived state: investigating
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investigating
Zscaler is investigating an issue impacting a subset of customers where API requests to the Zscaler Client Connector (ZCC) APIs through the Authentication Service (ZIdentity) may return HTTP 401 responses. Other API services may continue to operate as expected. Zscaler teams are actively investigating the issue and working to identify the cause. We will provide additional updates as more information becomes available. For detailed updates, please check the Service Status section in your Zsca...
