Buffer overflow in Microsoft Windows 10 Version 21h2
CVE-2026-69947
Heap-based buffer overflow in Windows Overlay Filter allows an unauthorized attacker to execute code with a physical attack.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Microsoft Windows 10 Version 21h2
- Microsoft Windows 10 Version 22h2
- Microsoft Windows 11 Version 23h2
- Microsoft Windows 11 Version 24h2
- Microsoft Windows 11 Version 25h2
- Microsoft Windows 11 Version 26h1
- Microsoft Windows 11 Version 26h2
- Microsoft Windows Server 2022
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core Installation)
Weakness classification (CWE)
References
- Windows Overlay Filter Remote Code Execution Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-69947?
- CVE-2026-69947 is a medium-severity vulnerability in Microsoft Windows 10 Version 21h2, classified under Heap-based Buffer Overflow. CVSS score: 6.8/10. Published 2026-10-13.
- How severe is CVE-2026-69947?
- Medium severity. CVSS v3 base score is 6.8 out of 10.