CVE-2026-20842 HIGH

CVE-2026-20842: Microsoft DWM Core Library Elevation of Privilege Vulnerability

Vendor Microsoft
Product Windows 10 Version 21H2
Weakness CWE-416
Published January 13, 2026
Last update April 1, 2026
View on NVD All CVEs

CVSS base score

7.0/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.

Key dates

02Disclosure timeline

January 13, 2026 CVE published
April 1, 2026 Record updated