CVE-2025-32701
Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability
Microsoft Windows
Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 13 May 2025. US federal agencies were required to remediate it by 3 June 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 1.4%, which is higher than 72% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2025-32701 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2025-32701.
What does CVE-2025-32701 affect?
CVE-2025-32701 affects Microsoft Windows. Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
How severe is CVE-2025-32701?
CVE-2025-32701 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 1.4%, higher than 72% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 3 June 2025.
How should organisations respond to CVE-2025-32701?
Apply the vendor patch for Microsoft Windows as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.