CVE-2026-83781 HIGH

CVE-2026-83781: Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability

Vendor Microsoft
Product Windows 11 version 23H2
Weakness CWE-170
Published October 13, 2026
Last update October 16, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Improper null termination in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

Key dates

02Disclosure timeline

October 13, 2026 CVE published
October 16, 2026 Record updated