New Multi-region uptime checks and custom-domain status pages

Zscaler Outage History

Daily provider-status observations and published incident history for Zscaler.

Degraded performance

Zscaler is reporting degraded performance. Verified . Official provider source.

Looking for an update now? Check the current status, or follow Zscaler for future changes.

14.3% of 28 verified observed days had no reported provider issue

90-Day Trend

Jul 22Oct 20

Dashed calendar markers below identify legacy observations whose source-at-observation was not recorded.

Recorded Daily Status (Last 62 Days)

Jul 22 Today
Legacy observation Operational Degraded Partial Outage Major Outage Maintenance No Data

Incident History

October 2026
ZTB API Service Issues in AMER (ZTB-US-M4) Cloud - ztb-us-m4
minor

View incident details and source

Notice published:

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.
Device Posture Dashboard Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
minor

View incident details and source

Notice published:

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.
September 2026
DLP Scanning Delays - zscalertwo.net
minor

View incident details and source

Notice published:

Provider resolved: . The notice publication date does not establish the outage start.

resolved
The fix has been deployed, and DLP scanning has returned to normal. Zscaler has confirmed service stability, and the incident is resolved.
Connectivity Issues Through AWS Cloud Connectors - zscloud.net
major

View incident details and source

Notice published:

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.
Zscaler Client Connector Portal Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
minor

View incident details and source

Notice published:

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.
Jakarta I Datacenter Issue - zscalertwo.net
minor

View incident details and source

Notice published:

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.
Reporting and Logging Issue - zscalertwo.net
minor

View incident details and source

Notice published:

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.
Abu Dhabi I Data Center Issue - zscloud.net
minor

View incident details and source

Notice published:

Provider resolved: . The notice publication date does not establish the outage start.

resolved
Zscaler identified took steps to resolve the issue. The environment is now stable and the issue is resolved.
ZPA Browser Isolation Policy Issue - private.zscaler.com, zpatwo.net, zpabeta.net
minor

View incident details and source

Notice published:

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
minor

View incident details and source

Notice published:

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.

March 2026
Scheduled Maintenance on AMER region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major Source not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the AMER region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 PM Pacific Time on Mar 14, 2026 (Sunday, Mar 15, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after ...
Scheduled Maintenance on APAC region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major Source not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the APAC region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Saturday at 6:00 AM Pacific Time on Mar 14, 2026 (Saturday, Mar 14, 2026 01:00 PM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available afte...
Scheduled Maintenance on EMEA region's Egress NAT nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net
major Source not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on the EMEA region's Egress NAT nodes on zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net clouds. This maintenance is scheduled for Friday at 6:00 PM Pacific Time on Mar 13, 2026 (Saturday, Mar 14, 2026 01:00 AM UTC), and can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after ...