Heap-based buffer overflow in Microsoft Windows - CVE-2026-112971
Published: November 11, 2026
Vulnerability identifier: #VU164892
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-2026-112971
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges to SYSTEM.
The vulnerability exists due to a heap-based buffer overflow in Windows SMB Client when processing data. A local user can trigger memory corruption in the client to gain SYSTEM privileges.
Affected software
Microsoft Windows
How to mitigate CVE-2026-112971
Install security update from vendor's website.
Microsoft Windows - update to 11 26H1 10.0.28000.3501