Windows 10 1607
CVE-2026-20839
MEDIUM
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.
AnalysisAI
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. No patch is currently available for this vulnerability.
Technical ContextAI
Classified as CWE-284 (Improper Access Control). Affects Windows 10 1607. Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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