CVE-2026-69563

EUVD-2026-73016 · Published Sep 8, 2026

Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

Technologies

Microsoft Windows 11 26H1Microsoft Windows 11 24H2Microsoft Windows 11 25H2Microsoft Windows Server 2016Microsoft Windows Server 2022Microsoft Windows 10 1809Microsoft Windows 11 23H2Microsoft Windows Server 2019Microsoft Windows 10 22H2Microsoft Windows Server 2025Microsoft Windows 10 1607Microsoft Windows 10 21H2

Weaknesses

CWE-122CWE-367

CVSS scores

v3.17.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Privilege Escalation

T1068Exploitation for Privilege Escalation

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69563

Potentially impacted assets

See if this affects your attack surface