CVE-2026-83565

Buffer over-read in Windows Encrypting File System (EFS) allows an authorized attacker to disclose…

Risk score: 41/100
CVSS: 5.5 v3.1
Exploit chance (30 days): 0.5%
Published: 13 Oct 2026

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What to know

What it is: Buffer over-read in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information locally.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 5.5 medium

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83565

Original description

Buffer over-read in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information locally.

Last activity 13 Oct 2026. Patch Forecast updates every hour.