CVE-2023-23376
Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability
Microsoft Windows
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 14 February 2023. US federal agencies were required to remediate it by 7 March 2023. CISA records this vulnerability as known to be used in ransomware campaigns.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 10.9%, which is higher than 95.9% 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-2023-23376 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-23376.
What does CVE-2023-23376 affect?
CVE-2023-23376 affects Microsoft Windows. Windows Common Log File System Driver Elevation of Privilege Vulnerability
How severe is CVE-2023-23376?
CVE-2023-23376 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 10.9%, higher than 95.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 7 March 2023.
How should organisations respond to CVE-2023-23376?
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.