CVE-2025-26671

Windows Remote Desktop Services Remote Code Execution Vulnerability

CVE-2025-26671 is fixed in 15 products on 1 platform, first by KB5055521, released April 8, 2025. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.1

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0120

68th percentile

<p>Use after free in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows Server 2008 R2 for x64-based Systems Service Pack 1		KB5055561	Apr 8, 2025
Windows Server 2008 R2 for x64-based Systems Service Pack 1		KB5055570	Apr 8, 2025
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)		KB5055561	Apr 8, 2025
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)		KB5055570	Apr 8, 2025
Windows Server 2012		KB5055581	Apr 8, 2025
Windows Server 2012 (Server Core installation)		KB5055581	Apr 8, 2025
Windows Server 2012 R2		KB5055557	Apr 8, 2025
Windows Server 2012 R2 (Server Core installation)		KB5055557	Apr 8, 2025
Windows Server 2016	14393.7969	KB5055521	Apr 8, 2025
Windows Server 2016 (Server Core installation)	14393.7969	KB5055521	Apr 8, 2025
Windows Server 2019	17763.7136	KB5055519	Apr 8, 2025
Windows Server 2019 (Server Core installation)	17763.7136	KB5055519	Apr 8, 2025
Windows Server 2022	20348.3453	KB5055526	Apr 8, 2025
Windows Server 2022 (Server Core installation)	20348.3453	KB5055526	Apr 8, 2025
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.1551	KB5055527	Apr 8, 2025
Windows Server 2025	26100.3775	KB5055523	Apr 8, 2025
Windows Server 2025 (Server Core installation)	26100.3775	KB5055523	Apr 8, 2025

Details

Published
April 8, 2025
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26671

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