CVE-2026-20819 — Untrusted Pointer Dereference in Microsoft Windows 11 Version 22h3

CWE-822 — Untrusted Pointer Dereference5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 87.91%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
Microsoft Windows 11 Version 22h3Microsoft Windows 11 Version 23h2Microsoft Windows 11 Version 24h2+4 more
Timeline
PublishedJan 13

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitability: 1.8 | Impact: 3.6

Affected Packages7 packages

▶NVDmicrosoft/windows_11_23h2< 10.0.22631.6491
▶NVDmicrosoft/windows_11_24h2< 10.0.26100.7623
▶NVDmicrosoft/windows_11_25h2< 10.0.26200.7623
▶CVEListV5microsoft/windows_11_version_22h310.0.22631.0 — 10.0.22631.6491
▶CVEListV5microsoft/windows_11_version_23h210.0.22631.0 — 10.0.22631.6491

🔴Vulnerability Details

2
GHSA
GHSA-5jf9-4wp5-w27r: Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally↗2026-01-13
▶
CVEList
Windows Virtualization-Based Security (VBS) Information Disclosure Vulnerability↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Windows Virtualization-Based Security (VBS) Information Disclosure Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20819 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-20819 — Untrusted Pointer Dereference | cvebase