Heap-based buffer overflow in Microsoft Windows - CVE-2026-112800
Published: November 11, 2026
Vulnerability identifier: #VU164868
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-112800
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 from Medium Integrity Level to Local Service.
The vulnerability exists due to a heap-based buffer overflow in Windows Diagnostic Policy Service when handling data in heap memory. A local user can trigger a write beyond the bounds of a heap buffer to elevate privileges to Local Service.
Affected software
Microsoft Windows
How to mitigate CVE-2026-112800
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