Vulnerability in Microsoft Windows_11_23h2
CVE-2026-20819
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.
EPSS: 0.005 (41.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Microsoft Windows_11_23h2
- Microsoft Windows_11_24h2
- Microsoft Windows_11_25h2
- Microsoft Windows 11 Version 22h3 — versions 10.0.22631.0
- Microsoft Windows 11 Version 23h2 — versions 10.0.22631.0
- Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
- Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20819?
- CVE-2026-20819 is a medium-severity vulnerability in Microsoft Windows_11_23h2, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-01-13.
- How severe is CVE-2026-20819?
- Medium severity. CVSS v3 base score is 5.5 out of 10.