Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-122168

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Main Vulnerability Database Vulnerabilities #VU165451

Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-122168

Published: November 11, 2026


Vulnerability identifier: #VU165451
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-122168
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to elevate privileges by executing code in the context of a protected media process.

The vulnerability exists due to a heap-based buffer overflow in Microsoft Windows Media Foundation when handling input. A local user can trigger heap memory corruption locally to execute code in the context of a protected media process.

Exploitation alone does not grant administrator or SYSTEM-account privileges.


Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-122168

Install security update from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7846, 10 22H2 10.0.19045.7846, 10 1607 10.0.14393.9688, 10 1809 10.0.17763.9487, 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501
Windows Server - addressed in versions 2016 10.0.14393.9688, 2019 10.0.17763.9487, 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822

External References

Related Security Bulletins