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

Source: https://junglewise.ai/threats/cve-2021-40407-reolink-rlc-410w-ip-camera-os-command-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-12-18. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2021-40407 · Severity: critical · CVSS 9.1 · Exploited in the wild · Published 2024-12-18

An OS command injection vulnerability exists in the Reolink RLC-410W IP camera due to improper validation of the domain parameter in the SetDdns API. An authenticated attacker can trigger this vulnerability by sending a specially crafted HTTP request to the device's network settings functionality, leading to arbitrary command execution.

## Quick answers

**Is CVE-2021-40407 exploited in the wild?** Yes. CVE-2021-40407 is known to be exploited in the wild, first recorded on 18 December 2024. Treat it as urgent.

**How severe is CVE-2021-40407?** Critical severity, with a CVSS score of 9.1, published 18 December 2024.

**Which products and versions are affected?** Reolink RLC-410W Firmware 3.0.0.136_20121102; Reolink RLC-410W IP Camera.

**Is there a fix for CVE-2021-40407?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2021-40407 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2021-40407?** Check whether you run Reolink RLC-410W IP Camera. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Reolink RLC-410W Firmware 3.0.0.136_20121102
- Reolink RLC-410W IP Camera

## Timeline

- 2022-01-28: disclosed: NVD Published Date
- 2024-12-18: kev added: Added to CISA Known Exploited Vulnerabilities Catalog