CVE-2025-55687CWE-362CWE-416

Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability

High · published October 14, 2025

CVSS v3.1
7.4
EPSS
0%
Percentile
16.9
In the wild
Unconfirmed
What it is

⚡ A sneaky race condition in the Windows Resilient File System (ReFS) could let unauthorized attackers sidestep security and elevate their privileges locally! 🔥 Think of it like a busy restaurant kitchen where two chefs try to take the last ingredient at the same time without checking if it’s reserved for someone else — whoever gets there first serves the dish, and that could mean a recipe gone wrong! If exploited, this vulnerability could allow an attacker to gain unauthorized access to sensitive system resources and execute commands with heightened privileges. This might lead to data breaches, system manipulation, or even total control over affected machines, putting your entire system at risk!

Put simply

Think of it like a busy restaurant kitchen where two chefs try to take the last ingredient at the same time without checking if it’s reserved for someone else — whoever gets there first serves the dish, and that could mean a recipe gone wrong! The CVE-2025-55687 vulnerability arises from improper synchronization during concurrent access to a shared resource in ReFS, allowing an attacker to exploit this race condition to elevate their local privileges.

What to do

If exploited, this vulnerability could allow an attacker to gain unauthorized access to sensitive system resources and execute commands with heightened privileges. This might lead to data breaches, system manipulation, or even total control over affected machines, putting your entire system at risk! To mitigate this risk, update your Windows system to the latest version as soon as updates are available. Regularly monitor and apply security patches, and consider implementing stricter access controls to limit potential exploitation. 🛡️ You’ve got this! Stay proactive and secure your system with these steps. Together, we'll keep the internet safe! 💪😊

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00261 · 16.9th percentile
Weaknesses
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'); CWE-416 · Use After Free
Published
2025-10-14T17:00Z
EPSS history
Timeline
  • 14 OCT 17:00Z
    Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
    cvelistv5