CVE-2023-6548
Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability
Citrix NetScaler ADC and NetScaler Gateway
Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 17 January 2024. US federal agencies were required to remediate it by 24 January 2024.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 3.2%, which is higher than 88.2% 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:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Frequently asked questions
Is CVE-2023-6548 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-6548.
What does CVE-2023-6548 affect?
CVE-2023-6548 affects Citrix NetScaler ADC and NetScaler Gateway. Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.
How severe is CVE-2023-6548?
CVE-2023-6548 is rated MEDIUM with a CVSS base score of 5.5. EPSS puts the probability of exploitation in the next 30 days at 3.2%, higher than 88.2% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 24 January 2024.
How should organisations respond to CVE-2023-6548?
Apply the vendor patch for Citrix NetScaler ADC and NetScaler 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.