CVE-2025-49721 Windows Fast FAT File System Driver Elevation of Privilege Vulnerability
A heap-based buffer overflow in the Windows Fast FAT driver allows local attackers to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-49721?
CVE-2025-49721 is a high-severity memory corruption vulnerability in Microsoft Windows 10 1507, published on 8 Jul 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally.
Weakness: CWE-122
Which versions are affected by CVE-2025-49721?
It affects 15 products.
Products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 22h2 and 9 more.
How do I fix CVE-2025-49721?
No fix has been published for CVE-2025-49721 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-49721 being exploited?
There is no known exploitation of CVE-2025-49721 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1507
- CVE-2017-8543 Microsoft Windows Search Remote Code Execution
- CVE-2025-33053 Microsoft Windows External Control of File Name or Path
- CVE-2025-33073 Microsoft Windows SMB Client Improper Access Control
- CVE-2024-49039 Microsoft Windows Task Scheduler Privilege Escalation
- CVE-2024-43461 Microsoft Windows MSHTML Platform Spoofing
Sources
Also known as GHSA-2qpf-4qw3-28fj.