CVE-2023-29336
Microsoft Win32K Privilege Escalation Vulnerability
Microsoft Win32k
Win32k Elevation of Privilege Vulnerability
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 9 May 2023. US federal agencies were required to remediate it by 30 May 2023.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 41.2%, which is higher than 98.7% 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-2023-29336 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-29336.
What does CVE-2023-29336 affect?
CVE-2023-29336 affects Microsoft Win32k. Win32k Elevation of Privilege Vulnerability
How severe is CVE-2023-29336?
CVE-2023-29336 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 41.2%, higher than 98.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 30 May 2023.
How should organisations respond to CVE-2023-29336?
Apply the vendor patch for Microsoft Win32k 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.