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CVE-2021-40407

7.2, high Known exploited

Reolink RLC-410W IP Camera OS Command Injection Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
7.2, high high CVSS v3.1
EPSS, next 30 days
48% higher than 98.8% of scored CVEs
Exploitation
Confirmed in the wild
Published
28 Jan 20224 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 18 Dec 2024. US federal agencies had to remediate by 8 Jan 2025, a deadline that has passed.

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.

Description

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.

Details

Vendor
Reolink
Product
Rlc-410w Firmware
Weakness
CWE-78 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
talos-cna@cisco.com

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References 2

Exploit code 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Reolink CVEs

Every Reolink CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2019-11001 Reolink Multiple IP Cameras OS Command Injection Vulnerability KEV EPSS 38% 7.2, high

Beyond this page

Is CVE-2021-40407 in your network?

This page tells you how dangerous CVE-2021-40407 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2021-40407 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2021-40407 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.