CVE-2025-55687 Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
A race condition in Windows ReFS allows local attackers to elevate privileges, requiring immediate patching for all affected Windows versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-55687?
CVE-2025-55687 is a high-severity vulnerability in Microsoft Windows 10 1507, published on 14 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Resilient File System (ReFS) allows an unauthorized attacker to elevate privileges locally.
Which versions are affected by CVE-2025-55687?
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-2025-55687?
No fix has been published for CVE-2025-55687 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-55687 being exploited?
There is no known exploitation of CVE-2025-55687 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-h656-3w5x-8qxp.