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MSRC compact vulnerability detail

CVE-2026-20935 · Windows Virtualization-Based Security (VBS) Information Disclosure Vulnerability

Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an unauthorized attacker to disclose information locally.

Severity
Important
Impact
Information Disclosure
CVSS
6.2 base · 5.4 temporal
Release
2026-01-13
Signals
Windows Virtualization-Based Security (VBS) Enclave Information Disclosure Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-822: Untrusted Pointer Dereference
Patch Diff
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Description
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an unauthorized attacker to disclose information locally.
FAQ / Articles
Windows Virtualization-Based Security (VBS) Enclave Information Disclosure Vulnerability
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an unauthorized attacker to disclose information locally.
FAQ
What type of information could be disclosed by this vulnerability? An attacker who successfully exploited this vulnerability could view Virtual Trust Level 1 (VTL1) data from Virtual Trust 0 (VTL0) which is the least privileged level.