CVE-2026-33840

EUVD-2026-29586
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Windows Releases
Platform
Version
Windows 11
24H2 (arm64, x64)
KB5089549
25H2 (arm64, x64)
KB5089549
26H1 (arm64, x64)
KB5089548
Windows Server 2025
Server Core
KB5087539
Standard
KB5087539
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33840