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Microsoft MSMQ and IIS December 2025 update disruption

Service Disruption
First reported
Last updated
Happening score
H score 0
1 unique sources, 1 articles

Summary

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Microsoft's December 2025 security updates are breaking Message Queuing (MSMQ) on impacted Windows 10 22H2, Windows Server 2019, and Windows Server 2016 systems, disrupting enterprise applications and IIS websites. Affected environments can see inactive queues, resource errors, and applications that cannot write to queues. Microsoft says the issue comes from MSMQ security model changes and altered NTFS permissions on `C:\Windows\System32\MSMQ\storage`. Administrators may need to roll back the updates while waiting for a fix.

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Timeline

  1. 15.12.2025 11:04 2 articles · 5mo ago

    Initial report: Microsoft MSMQ and IIS December 2025 update disruption

    Initial Disclosure

    Microsoft identified a known issue in the **December 2025 security updates** after users began reporting **MSMQ** queue failures and **IIS** site errors. The disruption is linked to permission changes in the MSMQ storage path on affected Windows versions.

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