Type Confusion in Microsoft Windows - CVE-2026-112753
Published: November 11, 2026
Vulnerability identifier: #VU164840
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-2026-112753
CWE-ID: CWE-843
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 type confusion in the Windows Container Isolation FS Filter Driver (unionfs.sys) when accessing a resource using an incompatible type. A local user can exploit this flaw locally to gain SYSTEM privileges.
Successful exploitation requires winning a race condition.
Affected software
Microsoft Windows
How to mitigate CVE-2026-112753
Install security update from vendor's website.
Microsoft Windows - update to 11 26H1 10.0.28000.3501