Type Confusion in Windows and Windows Server - CVE-2026-20806
Published: April 15, 2026
Vulnerability identifier: #VU126154
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20806
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to a type confusion error in Windows COM Server. A local user can pass specially crafted data to the application, trigger a type confusion error and gain access to sensitive information on the target system.
How to mitigate CVE-2026-20806
Install updates from vendor's website.