Main Vulnerability Database Vulnerabilities #VU154457

Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-69947

Published: October 13, 2026

Vulnerability identifier: #VU154457

CSH Severity: Medium

CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-69947

CWE-ID: CWE-122

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows an attacker with physical access to execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in Windows Overlay Filter when the component is targeted through physical access. An attacker with physical access can exploit the buffer overflow through a physical attack to execute arbitrary code.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-69947

Install security update from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7807, 11 23H2 10.0.22631.7652, 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231
Windows Server - addressed in versions 2022 10.0.20348.5761, 2025 10.0.26100.33650

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-69947

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