Outage in Cyderes
Azure Sentinel SIEM - Detection Rules
Resolved MinorIncident Report
We have identified a recent Microsoft parser change affecting Azure Sentinel that is impacting the performance and reliability of certain SIEM detection rules.
Our team is actively working with Microsoft to validate the root cause and drive a permanent resolution. In parallel, we are working to implement temporary mitigations to restore detection coverage where impacted.
We will continue to monitor the situation closely and provide updates as more information becomes available.
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Latest Updates ( sorted recent to last )
RESOLVED
1 day ago - at 03/25/2026 08:03PM
This incident has been resolved.
MONITORING
1 day ago - at 03/25/2026 03:54PM
Cyderes has developed custom parser configuration changes and have restored impacted detection coverage.
These changes have been deployed and have been under evaluation for over 24 hours with no further issues identified. For this resolved matter, if you have any questions, please contact your Client Success Manager.
IDENTIFIED
3 days ago - at 03/24/2026 01:23AM
Cyderes is continuing to work with Microsoft to implement a resolution.
Cyderes has identified and developed custom parser configuration changes to address this situation and restore impacted detection coverage. These changes have been deployed and are under evaluation currently.
INVESTIGATING
3 days ago - at 03/23/2026 07:02PM
We have identified a recent Microsoft parser change affecting Azure Sentinel that is impacting the performance and reliability of certain SIEM detection rules.
Our team is actively working with Microsoft to validate the root cause and drive a permanent resolution. In parallel, we are working to implement temporary mitigations to restore detection coverage where impacted.
We will continue to monitor the situation closely and provide updates as more information becomes available.
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