CVE-2026-20938

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

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20938	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:*

History

No history.

Information

Published : 2026-01-13 18:16

Updated : 2026-01-16 15:47

NVD link : CVE-2026-20938

Mitre link : CVE-2026-20938

CVE.ORG link : CVE-2026-20938

JSON object : View

Products Affected

microsoft

windows_11_25h2
windows_11_23h2
windows_11_24h2

CWE

CWE-822

Untrusted Pointer Dereference

{"id": "CVE-2026-20938", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2026-01-13T18:16:20.980", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20938", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-822"}]}], "descriptions": [{"lang": "en", "value": "Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally."}], "lastModified": "2026-01-16T15:47:57.130", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "7D2B0BB9-E94A-420E-8E53-A4C1136DE73E", "versionEndExcluding": "10.0.22631.6491"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "78C4B71B-5345-4D83-A0A9-A15F783CF9A9", "versionEndExcluding": "10.0.22631.6491"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "208734FD-5175-4856-9D08-ED6CFF64AA14", "versionEndExcluding": "10.0.26100.7623"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "846261D4-ECC2-4DCB-8F8F-F27F8C99F061", "versionEndExcluding": "10.0.26100.7623"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "33E138A3-968B-4109-AC13-D488685F0AF2", "versionEndExcluding": "10.0.26200.7623"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "CC1FE5A1-3E6E-4606-899B-BF7BF3D3DD8D", "versionEndExcluding": "10.0.26200.7623"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}