CVE-2026-20870

Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

CVSS 7.8 HIGHEPSS 0.4%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.4%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 Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products

References