CVE-2026-21239 HIGH

CVE-2026-21239: Windows Kernel Elevation of Privilege Vulnerability

Vendor Microsoft
Product Windows 10 Version 1607
Weakness CWE-122
Published February 10, 2026
Last update May 11, 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

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Key dates

02Disclosure timeline

February 10, 2026 CVE published
May 11, 2026 Record updated