CVE-2021-40407
Reolink RLC-410W IP Camera OS Command Injection Vulnerability
Reolink RLC-410W IP Camera
An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2], based on DDNS type, the ddns->domain variable, that has the value of the domain parameter provided through the SetDdns API, is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 18 December 2024. US federal agencies were required to remediate it by 8 January 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 47.6%, which is higher than 98.9% 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:H/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2021-40407 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-40407.
What does CVE-2021-40407 affect?
CVE-2021-40407 affects Reolink RLC-410W IP Camera. An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2], based on DDNS type, the ddns->domain variable, that has the value of the domain parameter provided through the SetDdns API, is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability.
How severe is CVE-2021-40407?
CVE-2021-40407 is rated HIGH with a CVSS base score of 7.2. EPSS puts the probability of exploitation in the next 30 days at 47.6%, higher than 98.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 8 January 2025.
How should organisations respond to CVE-2021-40407?
Apply the vendor patch for Reolink RLC-410W IP Camera 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.