CVE-2026-20858
Windows Management Services Elevation of Privilege Vulnerability
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
13 Jan 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:T/RC:C
Affected products
Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 version 22H3Microsoft · Windows 11 Version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)Want to know if your infrastructure is exposed to this?
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