CVE-2026-20939

MEDIUM
2026-01-13 [email protected]
5.5
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
MEDIUM 5.5

Tags

Windows Windows Server 2022 23h2 Windows 11 24h2 Windows 10 21h2 Windows 10 1607 Windows Server 2016 Windows 10 22h2 Windows Server 2022 Windows 10 1809 Windows Server 2025 Windows 11 25h2 Windows Server 2019 Windows 11 23h2 Microsoft

Description

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

Analysis

Windows File Explorer information disclosure affects Windows 10 and 11 systems, allowing local authenticated attackers to access sensitive data through improper access controls. The vulnerability requires valid user credentials and local system access, posing a risk in multi-user or shared computing environments where sensitive files may be exposed to other authorized users.

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review data exposure and access controls.

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Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: 0

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CVE-2026-20939 vulnerability details – vuln.today
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