IRONSMITHINTEL
HIGHCVSS7.2
|
Actively Exploited
|CISA KEV|CVE-2021-40407|Auth: high — administrative privileges|Reboot: required|Manual only

Reolink RLC-410W IP Camera OS Command Injection Vulnerability

Reolink RLC-410W IP cameras contain an authenticated OS command injection vulnerability in the device network settings functionality.

Published Jan 28, 2022 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A remote attacker, with administrative privileges, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2025-01-08 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a OS Command Injection (CWE-78) vulnerability in 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 requires remote network access, low attack complexity, an administrative account, and no user interaction required.

Am I affected?Quick check

Probably yes if any of these apply:

IT Security
Running rlc-410w firmware: 3.0.0.136_20121102
Real-world incidentsWhat we've seen

Active exploitation documented in the wild. Threat-research write-up: https://talosintelligence.com/vulnerability_reports/TALOS-2021-1424

How to patch

Manual remediation steps

Apply the Vendor Patch

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.

CISA required action: The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable.

References

    1
    Vendor advisory: https://reolink.com/product-eol/
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2021-40407
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40407
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