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CVSS VectorNVD

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

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
HIGH 7.8

DescriptionNVD

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

AnalysisAI

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally. [CVSS 7.8 HIGH]

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RemediationAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

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CVE-2026-20840 vulnerability details – vuln.today

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