CVE-2026-20811 — Untrusted Pointer Dereference in Microsoft Windows 11 Version 22h3

CWE-822 — Untrusted Pointer DereferenceCWE-843 — Type Confusion5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.1%
top 74.84%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
10
Microsoft Windows 11 Version 22h3Microsoft Windows 11 Version 23h2Microsoft Windows 11 Version 24h2+7 more
Timeline
PublishedJan 13

Description

Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages10 packages

▶NVDmicrosoft/windows< 10.0.20348.4648+2
▶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_server_202210.0.20348.0 — 10.0.20348.4648

🔴Vulnerability Details

2
CVEList
Win32k Elevation of Privilege Vulnerability↗2026-01-13
▶
GHSA
GHSA-rcr5-pjrv-hxh5: Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Win32k Elevation of Privilege Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20811 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-20811 — Untrusted Pointer Dereference | cvebase