Microsoft issues out-of-band Windows 11 hotpatch KB5084597 for RRAS management tool security flaws
The Facts
- Microsoft released KB5084597 as an out-of-band (emergency) update/hotpatch for Windows 11.
- KB5084597 targets Windows 11 versions 24H2 and 25H2.
- The hotpatch addresses security issues in the Windows Routing and Remote Access Service (RRAS) management tool.
- The update was published/released on March 13, 2026.
- KB5084597 updates eligible devices to OS Builds 26100.7982 and 26200.7982.
- Microsoft linked the hotpatch to multiple CVEs, including CVE-2026-25172 and CVE-2026-25173.
Context
What does KB5084597 fix?
According to coverage citing Microsoft’s documentation, KB5084597 fixes vulnerabilities in the Windows Routing and Remote Access Service (RRAS) management tool, where connecting to a malicious remote server could allow an attacker to disrupt the tool or execute code on the device. Notebookcheck,borncity.com,Cyber Security News
Which Windows 11 versions and builds are affected by this hotpatch?
KB5084597 applies to Windows 11 24H2 and 25H2, and it moves eligible systems to OS Builds 26100.7982 and 26200.7982. Notebookcheck,Cyber Security News
Does installing KB5084597 require a restart?
Reporting on the release says KB5084597 is a hotpatch intended for eligible hotpatch-enabled managed devices and can be applied without requiring a restart on those eligible systems. Notebookcheck,Cyber Security News
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