Description

Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.

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r2

sp1

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*

*

*

x64

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20839

Vendor Advisory

Weaknesses

[email protected]

Primary
CWE-284

CVSS impact metrics

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

5.5 · Medium

Information

Source identifier

[email protected]

Vulnerability status

Analyzed

Published

2026-01-13T18:16:12.320Z

47 hours ago

Last modified

2026-01-15T14:30:43.793Z

3 hours ago