Is CVE-2021-40407 in the CISA KEV catalog?

Yes. CVE-2021-40407 is on the CISA Known Exploited Vulnerabilities list, added 2024-12-18.

What is the CVSS severity of CVE-2021-40407?

CVE-2021-40407 has a CVSS v3 base score of 7.2 (HIGH).

What is the EPSS score for CVE-2021-40407?

CVE-2021-40407 has an EPSS score of 47.91% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-40407

HIGHCISA KEVEPSS 99th pctl

7.2

CVSS v3

NVD

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.

CWE-78OS Command Injection

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

47.91%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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.

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.

Remediation due: 2025-01-08

References

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.