CVE-2016-6367
Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA) Software before 8.4(1) on ASA 5500, ASA 5500-X, PIX, and FWSM devices allows local users to gain privileges via invalid CLI commands, aka Bug ID CSCtu74257 or EPICBANANA.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 24 May 2022. US federal agencies were required to remediate it by 14 June 2022.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 22.6%, which is higher than 97.7% 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-2016-6367 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2016-6367.
What does CVE-2016-6367 affect?
CVE-2016-6367 affects Cisco Adaptive Security Appliance (ASA). Cisco Adaptive Security Appliance (ASA) Software before 8.4(1) on ASA 5500, ASA 5500-X, PIX, and FWSM devices allows local users to gain privileges via invalid CLI commands, aka Bug ID CSCtu74257 or EPICBANANA.
How severe is CVE-2016-6367?
CVE-2016-6367 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 22.6%, higher than 97.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 14 June 2022.
How should organisations respond to CVE-2016-6367?
Apply the vendor patch for Cisco Adaptive Security Appliance (ASA) 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.