CVE-2026-69347: Windows Fast FAT Driver Remote Code Execution Vulnerability

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 7.4

Published

2026-09-08

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69347

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• critical[NEU] [kritisch] Microsoft Windows: Mehrere Schwachstellencert-bund
• highCVE-2026-69347: Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to execu…nvd

Recent advisories for Windows Fast FAT

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• highCVE-2026-69347: Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to execu…nvd · 2026-09-08
• highCVE-2026-68878: Stack-based buffer overflow in Windows Fast FAT Driver allows an authorized attacker to elevat…nvd · 2026-09-08
• highCVE-2026-68878: Windows Fast FAT Driver Elevation of Privilege Vulnerabilitymsrc · 2026-09-08
• criticalexploitedCVE-2025-24985: Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerabilitycisa-kev · 2025-03-11

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