CVE-2021-40407: Reolink RLC-410W IP Camera OS Command Injection Vulnerability

High severity, CVSS 7.2. Actively exploited: in CISA KEV since 2024-12-18. EPSS: 47.6% chance of exploitation in the next 30 days.

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.

Affected products

• Reolink RLC-410W Firmware: version 3.0.0.136_20121102 only

Published 2022-01-28. Last modified 2026-06-17.