CVE-2026-40369

PoC —

CVSS 3.1

7.8 high

EPSS

5%p91

Published

May 12, 2026 (May 12, 2026)

Modified

Jun 26, 2026

Description

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

Vendors: microsoft
Products: windows 11 24h2, windows 11 25h2, windows 11 26h1, windows server 2025
Weakness: CWE-822
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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