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High severity7.1NVD Advisory· Published Sep 8, 2026· Updated Sep 8, 2026

CVE-2026-69688

CVE-2026-69688

Description

Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.

Affected products

1

Microsoft/Windows Encrypting File System (EFS)llm-fuzzy

Patches

Vulnerability mechanics

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69688nvd

News mentions

1

Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-Days
Cyber Security News · Sep 8, 2026