CVE-2025-55690

Windows PrintWorkflowUserSvc Elevation of Privilege Vulnerability

CVE-2025-55690 is fixed in 6 products on 1 platform, first by KB5066835, released October 14, 2025. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.0

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0035

28th percentile

<p>Use after free in Windows PrintWorkflowUserSvc allows an authorized attacker to elevate privileges locally.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Windows 11 Version 24H2 for ARM64-based Systems	KB5066835	Oct 14, 2025
Windows 11 Version 24H2 for x64-based Systems	KB5066835	Oct 14, 2025
Windows 11 Version 25H2 for ARM64-based Systems	KB5066835	Oct 14, 2025
Windows 11 Version 25H2 for x64-based Systems	KB5066835	Oct 14, 2025
Windows Server 2025	KB5066835	Oct 14, 2025
Windows Server 2025 (Server Core installation)	KB5066835	Oct 14, 2025

Details

Published
October 14, 2025
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55690

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