CVE-2026-40369

EUVD-2026-29651
Heap-based buffer overflow in Windows Kernel 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
Base Score
CVSS 3.x
EPSS Score
Percentile: 90%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_11_24h2
𝑥
< 10.0.26100.8390
microsoftwindows_11_24h2
𝑥
< 10.0.26100.8390
microsoftwindows_11_25h2
𝑥
< 10.0.26200.8390
microsoftwindows_11_25h2
𝑥
< 10.0.26200.8390
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2113
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2113
microsoftwindows_server_2025
𝑥
< 10.0.26100.32772
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 11
24H2 (arm64, x64)
25H2 (arm64, x64)
26H1 (arm64, x64)
Windows Server 2025
Server Core
Standard