Home/CVE/Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to
CVE

CVE-2026-20811

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

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

HIGH · CVSS 7.8 EPSS 0.00128
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-822Untrusted Pointer Dereference
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
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Affected Products & Versions

6
microsoft windows 11 23h2< 10.0.22631.6491
microsoft windows 11 24h2< 10.0.26100.7623
microsoft windows 11 25h2< 10.0.26200.7623
microsoft windows server 2022< 10.0.20348.4648
microsoft windows server 2022 23h2< 10.0.25398.2092
microsoft windows server 2025< 10.0.26100.32230
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Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jan 2026 · 06:16 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2026-20811Elevation of Privilege
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