PT-2026-2669 · Microsoft · Windows Virtualization-Based Security (Vbs) Enclave+1

Published 2026-01-13 · Updated 2026-01-17 · CVE-2026-20819

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Windows Virtualization-Based Security (VBS) Enclave (affected versions not specified)

Description An issue exists within Windows Virtualization-Based Security (VBS) Enclave that permits an authorized attacker to reveal information locally due to an untrusted pointer dereference. This could allow attackers to obtain sensitive information and impact the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Untrusted Pointer Dereference

Weakness Enumeration

CWE-822

Related Identifiers

BDU:2026-00484

CVE-2026-20819

Affected Products

Windows

Windows Virtualization-Based Security (Vbs) Enclave

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-20819 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20819 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20819 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20819 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00484 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20819 · Vendor Advisory
• https://twitter.com/CVEnew/status/2012490421620924810 · Twitter Post