CVE-2026-20839
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
Description
Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.
Analysis
Information disclosure in Windows Client-Side Caching Service allows authenticated local users to read sensitive data on affected systems including Windows 10, Windows 11, and Windows Server editions. An attacker with valid credentials can exploit improper access controls to access cached information without additional user interaction. …
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Remediation
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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Priority Score
28
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: 0
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External POC / Exploit Code
Leaving vuln.today
Destination URL
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