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Windows 10 1607 CVE-2026-20812

MEDIUM
Improper Input Validation (CWE-20)
2026-01-13 secure@microsoft.com
Information Disclosure Microsoft Windows 10 1607 Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 23h2 Windows 11 24h2 Windows 11 25h2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2022 23h2 Windows Server 2025
6.5
CVSS 3.1 · Vendor: microsoft
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Severity by source

Vendor (microsoft) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

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

DescriptionCVE.org

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. No patch is currently available for this medium-severity issue.

Technical ContextAI

Classified as CWE-20 (Improper Input Validation). Affects Windows 10 1607. Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

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Same technique Information Disclosure

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CVE-2026-20812 vulnerability details – vuln.today
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