CVE-2022-27518
Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability
Citrix Application Delivery Controller (ADC) and Gateway
Unauthenticated remote arbitrary code execution
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 13 December 2022. US federal agencies were required to remediate it by 3 January 2023.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 6.9%, which is higher than 94.1% 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2022-27518 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2022-27518.
What does CVE-2022-27518 affect?
CVE-2022-27518 affects Citrix Application Delivery Controller (ADC) and Gateway. Unauthenticated remote arbitrary code execution
How severe is CVE-2022-27518?
CVE-2022-27518 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 6.9%, higher than 94.1% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 3 January 2023.
How should organisations respond to CVE-2022-27518?
Apply the vendor patch for Citrix Application Delivery Controller (ADC) and Gateway 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.