Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-81354
Published: September 9, 2026
Vulnerability identifier: #VU148267
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-81354
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to elevate privileges.
The vulnerability exists due to a heap-based buffer overflow in the Windows Hello Face secure sensor adapter when processing malformed face data. A local privileged user can submit malformed face data to the Windows Hello Face secure sensor adapter to elevate privileges.
User interaction is not required.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-81354
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7725, 10 22H2 10.0.19045.7725, 10 1809 10.0.17763.9245, 11 23H2 10.0.22631.7582, 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954
Windows Server - update to 2019 10.0.17763.9245
Windows Server - update to 2019 10.0.17763.9245