Windows Fast FAT File System Driver Information Disclosure Vulnerability
CVE-2026-70277
Summary
Stack-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Products covered
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
Remediation
Install KB5120418. Install KB5120386. Install KB5120385.
Vendor-listed fixes
10.0.14393.9418
6.2.9200.26280
6.3.9600.23338
CVEs in this advisory 1
Update history
What changed in later vendor updates
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- The vendor changed its remediation guidance.
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.