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.
July 2026
Data at Rest Scanning Issue - zscloud.net
Source not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its zscloud.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 a recent service update.Update - Sun, 19 Jul 2026 07:30:04 UTCZscaler has made the necessary changes and implemented the required meas...
Urgent maintenance on ZS1 VZEN nodes - zscalerone.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing an urgent maintenance on the VZEN nodes in zscalerone.net cloud. The maintenance will happen across VZEN nodes during the window, beginning at 02:00 PM Pacific Time on Saturday, July 18, 2026 and continuing for up to 6 hours. VZEN's services may be restarted as part of this change and service for your end users might be disrupted during the window. All logs will be collected and available after maintenance is complete.
Required Action: Opt Out of Microsoft Azure Network Adapter (MANA) for Zscaler Cloud Connectors Deployed in Microsoft Azure - 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
Microsoft is currently deploying the Microsoft Azure Network Adapter (MANA), a next-generation network interface included within Azure Boost, across existing Azure virtual machine (VM) size families. This deployment will replace the Mellanox ConnectX-based Accelerated Networking hardware currently utilized by Cloud Connector. Effective August 1, 2026, Azure may automatically transition MANA-eligible VMs to MANA-capable hardware during routine lifecycle events, unless an explicit opt-out is ...
New York IV (NYC4) Datacenter Network Maintenance - zscalertwo.net, zscloud.net
minorSource not attested
Last archived state: resolved
View archived record details
resolved
Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.Maintenance window,Start: 2026-07-21 18:00 EDTEnd: 2026-07-21 21:00 EDT(i.e. 2026-07-21 22:00 - 2026-07-22 01:00 UTC)During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.Update - Tue, 21 Jul 2026 23:37:07 UTCThis activity has been completed. Please contact Zscaler Support if you have addition...
Scheduled Maintenance Extended - zscalerone.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 zscalerone.net cloud by 5 hour. 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.
Administration UI Issue - zscaler.net
Source not attested
Last archived state: investigating
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investigating
Zscaler has identified an issue affecting the Administration UI and Zscaler Client Connector Admin Portal on the zscaler.net cloud. Customers may experience issues accessing the Administration UI and the Zscaler Client Connector Admin 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 becom...
New Delhi Datacenter issue - zscalerthree.net
Source not attested
Last archived state: investigating
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investigating
Zscaler is currently investigating reports of an issue with its New Delhi I datacenter. 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 changes and updates wi...
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 June 1, 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 31, 2026.Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.RegionLocationCIDRNotesAmericasBuenos Aires II...
Reminder Notification for Additions to HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net
Source not attested
Last archived state: investigating
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investigating
Dear Customer, In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on June 1, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after July 31, 2026.CIDRNotes175.107.184.0/23New addition to Required Hub IP addressesPlease update your firewall policy rules and any upstream access control lists to...
Washington DC (WAS1) 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 Washington DC (WAS1) Datacenter.Scheduled Maintenance window, Start: 2026-07-17 02:00 UTC End: 2026-07-17 06:00 UTC (Local Time 2026-07-16 22:00 - 2026-07-17 02:00)Update: The maintenance window has been extended by an additional 2 hours.Update - Fri, 17 Jul 2026 05:12:26 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
