CVE-2021-36380
Sunhillo SureLine OS Command Injection Vulnerablity
Sunhillo SureLine
Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or dnsAddr /cgi/networkDiag.cgi.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 5 March 2024. US federal agencies were required to remediate it by 26 March 2024.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 97.6%, which is higher than 99.9% 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-2021-36380 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-36380.
What does CVE-2021-36380 affect?
CVE-2021-36380 affects Sunhillo SureLine. Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or dnsAddr /cgi/networkDiag.cgi.
How severe is CVE-2021-36380?
CVE-2021-36380 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 97.6%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 26 March 2024.
How should organisations respond to CVE-2021-36380?
Apply the vendor patch for Sunhillo SureLine 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.