CVE-2023-28229
Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability
Microsoft Windows CNG Key Isolation Service
Windows CNG Key Isolation Service Elevation of Privilege Vulnerability
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 4 October 2023. US federal agencies were required to remediate it by 25 October 2023.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 1.7%, which is higher than 76.4% 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:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-28229 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-28229.
What does CVE-2023-28229 affect?
CVE-2023-28229 affects Microsoft Windows CNG Key Isolation Service. Windows CNG Key Isolation Service Elevation of Privilege Vulnerability
How severe is CVE-2023-28229?
CVE-2023-28229 is rated HIGH with a CVSS base score of 7. EPSS puts the probability of exploitation in the next 30 days at 1.7%, higher than 76.4% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 25 October 2023.
How should organisations respond to CVE-2023-28229?
Apply the vendor patch for Microsoft Windows CNG Key Isolation Service 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.