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.
March 2026
Manchester I Datacenter Scheduled Maintenance - zscalertwo.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center. During the maintenance window the services through MAN1 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 March 18, 11:00 am PST (March 18, 18:00 UTC)End time is March 18, 4:00 pm PST (March 18, 23:00 UTC)
Vienna I Datacenter Scheduled Maintenance - zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Vienna I (VIE1) Data Center. During the maintenance window the services through VIE1 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 March 16, 1:00 pm PST (March 16, 8:00 UTC)End time is March 16, 7:00 pm PST (March 17, 2:00 UTC)
Manchester I Datacenter Scheduled Maintenance - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Manchester I (MAN1) Data Center. During the maintenance window the services through MAN1 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 March 17, 11:00 am PST (March 17, 18:00 UTC)End time is March 17, 4:00 pm PST (March 17, 23:00 UTC)
Manchester I Datacenter Scheduled Maintenance - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester I (MAN1) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscloud.net/cenrMaintenance Window:Start time is March 17, 11:00 am PST (March 17, 18:00 UTC)End time is March 17,...
Taipei II Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Taipei II (TPE2) Data Center. During the maintenance window the services through TPE2 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 March 17, 9:00 am PST (March 17, 16:00 UTC)End time is March 17, 2:00 pm PST (March 17, 21:00 UTC)
Taipei II Datacenter Scheduled Maintenance - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Taipei II (TPE2) data center. We expect minimal to no impact to services during the maintenance window. Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DCFor more information, please visit:https://config.zscaler.com/zscloud.net/cenrMaintenance Window:Start time is March 17, 9:00 am PST (March 17, 16:00 UTC)End time is March 17, 2:0...
On March 10, 2026, Zscaler was made aware of a campaign targeted at the Salesforce Experience Center impacting a large number of Salesforce customers, including Zscaler. Following guidance from Salesforce, Zscaler completed remediation of the incident on March 11, 2026.Unauthorized access to personal data was limited to the Name and Email Address field from the Commercial Zscaler Community Portal. The scope of the incident was confined to the Zscaler Commercial Salesforce tenant and...
Paris IV Datacenter Scheduled Maintenance - zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Paris IV (PAR4) Data Center. During the maintenance window the services through PAR4 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 March 16, 10:00 am PST (March 16, 17:00 UTC)End time is March 16, 3:00 pm PST (March 16, 22:00 UTC)
Oslo III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with our Oslo III 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 cha...
Zscaler Client Connector-Based End User Notifications Issue - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on 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.Resolved- Issue was related to node.Update - Fri, 13 Mar 2026 12:16:51 UTCFollowing the actions previous...
