Incident History
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Osaka I Datacenter Scheduled Maintenance - zscloud.net
Zscaler will be expanding its global data center footprint and performing planned maintenance at our Osaka I (OSA1) data center. We expect minimal to no impact to services during the …
New York IV Datacenter Scheduled Maintenance - zscloud.net
Zscaler will be performing planned maintenance at our New York IV (NYC4) Data Center. We expect minimal to no impact to services during the maintenance window.Maintenance Window:Start time is January 20, 5:00 …
Sao Paulo II Data Center Decommissioning (ZPA) - private.zscaler.com
Please be advised that Sao Paulo II (SAO2) Data Center will be shut down any time after March 16, 2026.Sao Paulo IV (SAO4) data center is already live and ready …
New York IV Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net
Zscaler will be expanding its global data center footprint and performing planned maintenance at our New York IV (NYC4) data center. We expect minimal to no impact to services during …
Vienna I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net
Zscaler will be expanding its global data center footprint and performing planned maintenance at our Vienna I (VIE1) data center. We expect minimal to no impact to services during the …
Tokyo IV Datacenter Scheduled Maintenance - zscloud.net
Zscaler will be performing planned maintenance at our Tokyo IV (TYO4) Data Center. We expect minimal to no impact to services during the maintenance window.Maintenance Window:Start time is January 21, 8:00 am …
Washington I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net
Zscaler will be expanding its core platform services and will be performing planned maintenance at our Washington I (WAS1) Data Center. We expect minimal to no impact to services during the …
SAML configurations may break on updates
Status: ResolvedOur Engineering team has resolved the issue. These systems should now be operating normally. If you continue to experience any problems, please open a ticket with our support team.Affected …
[INC-960] Network DDoS Issue Detected
Jan 16, 15:10 UTCResolved - Services are stable and operating normally.We identified an internal service issue that prevented customer traffic from being diverted to Imperva’s mitigation network during active attack …
Cloud Browser Isolation – Unable to create or modify isolation profiles - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
Zscaler has identified an issue within Cloud Browser Isolation (CBI) impacting customers with legacy isolation SKUs. Affected customers may experience difficulties when attempting to create or modify isolation profiles. We will …
PRIMARY BGP ROUTE - COGENT - Operational
PRIMARY BGP ROUTE - COGENT is Operational
Jan 16, 2026
10:00
Incident Advisory: INC-20260116-429
Jan 16, 04:18 UTCResolved - The issue has been identified, and we have taken mitigative measures to resolve the situation. This incident has been confirmed as a non-service-impacting issue.Jan 16, …
Partial Mimir Write Outage
Jan 16, 04:00 UTCResolved - This incident has been resolved. Both read and write 5xx's and increased latency were experienced in the two periods:23:56:15 to 00:32:45 UTC00:55:30 to 01:36:15 UTCJan …
Preventative Dashboard and Management API maintenance
Jan 16, 03:00 UTCCompleted - The scheduled maintenance has been completed.Jan 16, 02:30 UTCIn progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Jan 14, 04:24 …
Auckland II (AKL2) Datacenter Network Maintenance - zscalerthree.net
Zscaler will be performing hardware maintenance in Auckland II (AKL2) Datacenter.Scheduled Maintenance window, Start: 2026-01-19 08:00 UTC End: 2026-01-19 10:00 UTC (Local Time 2026-01-19 21:00 - 2026-01-19 23:00) Update …
[ICM-4509] Essential Maintenance on the Imperva data center in Jakarta, Indonesia
Jan 16, 00:51 UTCCompleted - The scheduled maintenance has been completed.Jan 15, 17:00 UTCIn progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Jan 8, 14:59 …
BYOL available for x86 SUSE Linux Enterprise Server SLES versions 15 and 16
BYOL available for x86 SUSE Linux Enterprise Server (SLES) versions 15 and 16 Bring your own license (BYOL) is now supported for x86 SUSE Linux Enterprise Server (SLES), versions 15 …
Sao Paulo I and Sao Paulo II Data Center Prolonged Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
You are receiving this notice in accordance with the Zscaler Service Continuity Policy.Please note that Zscaler will be performing prolonged scheduled Datacenter maintenance in Sao Paulo I (SAO1) and Sao Paulo II (SAO2) …
Singapore CDN & Storage Network Outage
Jan 15, 22:58 UTC Resolved - This incident has been resolved. Jan 15, 22:39 UTC Monitoring - A fix has been implemented, and we are monitoring. Jan 15, 22:28 UTC …
Incident: Trouble loading Slack, messages, or canvas
This issue is now resolved.Current status and recent actions taken: Affected users may have experienced performance issues in Slack.Scope: This issue did not affect any specific region, but a small …
Incident with Issues and Pull Requests
Jan 15, 18:54 UTCResolved - On January 15, 2026, between 16:40 UTC and 18:20 UTC, we observed increased latency and timeouts across Issues, Pull Requests, Notifications, Actions, Repositories, API, Account …
Capetown IV Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Zscaler has detected an issue with its Capetown IV datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC …
Compaction is having issues
Jan 15, 17:02 UTCResolved - This incident has been resolved.Jan 15, 07:28 UTCIdentified - The issue has been identified and a fix is being implemented.
Actions workflow run and job status updates are experiencing delays
Jan 15, 15:26 UTCResolved - On January 15th, between 14:18 UTC and 15:26 UTC, customers experienced delays in status updates for workflow runs and checks. Status updates were delayed by …
Maintenance task for Synthetic Monitoring ProbeFailedExecutionsTooHigh alert rule
Jan 15, 12:00 UTCCompleted - The scheduled maintenance has been completed.Jan 15, 11:20 UTCVerifying - Verification is currently underway for the maintenance items.Jan 15, 11:00 UTCIn progress - Scheduled maintenance …
Account access and Payment
Jan 15, 09:18 UTCResolved - Our Engineering team has resolved the issue with payments failure using PayNow. Users should not see any issues with making payments via PayNow and logging …
[Scheduled] Cloud | London-2 Maintenance
Type: Maintenance Duration: 53 minutes Affected Components: London-2 Jan 15, 08:00:00 GMT+0 - Identified - During this period, our data center provider will perform power maintenance involving the isolation of …
CDN | Santiago de Chile Incident Details
Type: Incident Duration: 3 hours and 55 minutes Affected Components: Santiago de Chile, Chile Jan 15, 08:15:59 GMT+0 - Resolved - We are happy to inform you that traffic has …
Sao Paulo II Datacenter Issue - zscloud.net
Zscaler has detected an issue with our Sao Paulo II datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary …
Urgent Maintenance - EMEA Region - zscloud.net
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the EMEA region's datacenters of zscloud.net. This maintenance is scheduled for Wednesday at 3:15 PM Pacific Time …
Urgent maintenance on the SJC DC's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the SJC DC's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is …
Incident with Webhooks
Jan 14, 21:38 UTCResolved - On January 14, 2026, between 19:34 UTC and 21:36 UTC, the Webhooks service experienced a degradation that delayed delivery of some webhooks. During this window, …
Incident: Trouble with adding payment methods
From 12:07 PM PST until 1:30 PM PST on January 14, 2026, some users were unable to add payment methods to their Slack billing pages.A recent backend change to our …
Red Hat Content Delivery Network (CDN) & Entitlement Network Modernization has begun
Jan 14, 21:07 UTCResolved - This incident has been resolved.Jan 14, 14:30 UTCMonitoring - We are currently working on updating our CDN and entitlement network to improve resiliency, security, and …
Connectivity issues for Azure PrivateLink endpoints.
Jan 14, 20:17 UTCResolved - The scope of this incident was smaller than originally anticipated.As of 16:27 UTC our engineering team merged a fix for those affected and we are …
Red Hat Content Delivery Network (CDN) & Entitlement Network Modernization
Jan 14, 20:00 UTCCompleted - The scheduled maintenance has been completed.Sep 24, 12:42 UTCScheduled - On January 14th, 2026 Red Hat will be making a number of changes to our …
[Retroactive] Incident with GitHub Copilot (GPT-5 model)
Jan 14, 18:00 UTCResolved - From January 14, 2026, at 18:15 UTC until January 15, 2026, at 11:30 UTC, GitHub Copilot users were unable to select the GPT-5 model for …
PAN-SA-2026-0001 Chromium: Monthly Vulnerability Update (January 2026) (Severity: MEDIUM)
Edge Function increased error rate in EU-West-1
Jan 14, 14:44 UTCResolved - This incident has been resolved.Jan 14, 13:12 UTCMonitoring - A fix has been implemented and we are monitoring the results.Jan 14, 13:00 UTCIdentified - The …
Elevated error rates on Opus 4.5 and Sonnet 4.5
Jan 14, 14:17 UTCResolved - This incident has been resolved.Jan 14, 14:06 UTCUpdate - We are continuing to monitor for any further issues.Jan 14, 13:31 UTCMonitoring - A fix has …
Claude Opus 4.5 model experiencing degraded performance
Jan 14, 12:23 UTCResolved - On January 14th, 2026, between approximately 10:20 and 11:25 UTC, the Copilot service experienced a degradation of the Claude Opus 4.5 model due to an …
Copilot's GPT-5.1 model has degraded performance
Jan 14, 10:52 UTCResolved - This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared …
Elevated build failure rates
Jan 14, 10:50 UTCResolved - After monitoring our fix, we found no new occurrences of build errors. This issue has been resolved.Jan 14, 02:22 UTCMonitoring - A fix has been …
Elevated real-time error rates in ap-se-1
Jan 14, 10:07 UTCResolved - We've confirmed that the elevated 5xx errors and high response times were isolated to the ap-southeast-1 region. Other regions remained healthy throughout the incident.Dashboards showed …
Maintenance on Grafana Databases
Jan 14, 09:00 UTCCompleted - The scheduled maintenance has been completed.Jan 14, 07:00 UTCIn progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Jan 7, 10:02 …
Urgent Maintenance on Admin UI - zscalerthree.net
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerthree.net cloud. This maintenance is scheduled for Tuesday at 10:00 PM Pacific Time on Jan 13, 2026 …
Urgent Maintenance on Admin UI - zscalertwo.net
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalertwo.net cloud. This maintenance is scheduled for Tuesday at 10:00 PM Pacific Time on Jan 13, 2026 …
Urgent Maintenance on Admin UI - zscloud.net
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscloud.net cloud. This maintenance is scheduled for Tuesday at 9:00 PM Pacific Time on Jan 13, 2026 …
Urgent Maintenance on Admin UI - zscaler.net
The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Tuesday at 7:00 PM Pacific Time on Jan 13, 2026 …
[ICM-4367] Planned Maintenance on the Imperva data center in Amsterdam, Netherlands
Jan 14, 01:22 UTCCompleted - The scheduled maintenance has been completed.Jan 13, 23:00 UTCIn progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Dec 12, 02:29 …