CVE-2026-20819

Name: CVE-2026-20819
Creator: NVD / NIST
Published: 2026-01-13T18:16:08.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2026-20819 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.55%

41.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-822

Affected Software

Vendor	Product	Versions
Microsoft	Windows 11 23h2	< 10.0.22631.6491
Microsoft	Windows 11 24h2	< 10.0.26100.7623
Microsoft	Windows 11 25h2	< 10.0.26200.7623

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20819Vendor Advisory

Timeline

Published: Jan 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20819?

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

How severe is CVE-2026-20819?

CVE-2026-20819 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20819?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20819?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST