Windows Fast FAT File System Driver Information Disclosure Vulnerability
CVE-2026-70277
Summary
Exposure of sensitive system information to an unauthorized control sphere in Windows MIDI Service Module allows an authorized attacker to disclose information locally.
Products covered
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows 11 version 26H1 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Remediation
Install KB5124008. Install KB5124012.
Vendor-listed fixes
10.0.26200.9445
10.0.26100.9445
10.0.28000.2954
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Confirmed at the source
Our collector saw this advisory during a later source check.