Untrusted Pointer Dereference in Windows - CVE-2026-20819

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Main Vulnerability Database Vulnerabilities #VU121247

Untrusted Pointer Dereference in Windows - CVE-2026-20819

Published: January 13, 2026


Vulnerability identifier: #VU121247
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-2026-20819
CWE-ID: CWE-822
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Windows

Detailed vulnerability description

The vulnerability allows a local user to gain access to sensitive information on the system.

The vulnerability exists due to untrusted pointer dereference in Windows Virtualization-Based Security (VBS). A local user can disclose sensitive information on the target system.


How to mitigate CVE-2026-20819

Install updates from vendor's website.

Sources