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Windows CVE-2026-20812

MEDIUM
Improper Input Validation (CWE-20)
2026-01-13 secure@microsoft.com
6.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
MEDIUM 6.5

DescriptionNVD

Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.

AnalysisAI

Windows LDAP input validation bypass in Windows 10 21H2, Windows 11 24H2, and Windows Server 2022 23H2 enables authenticated network attackers to modify data integrity without detection. The vulnerability requires valid credentials and network access but does not provide elevation of privilege or confidentiality breaches. …

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RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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CVE-2026-20812 vulnerability details – vuln.today

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