Is CVE-2021-40414 actively exploited?

No active exploitation of CVE-2021-40414 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40414 be exploited remotely?

Yes. CVE-2021-40414 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40414?

CVE-2021-40414 has a CVSS score of 7.1 (HIGH).

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HIGH

CVE-2021-40414

CWE-284Published: January 28, 2022· Updated: Jun 17, 2026

7.1

CVSS v3.1

Official Description

An incorrect default permission vulnerability exists in the cgiserver.cgi cgi_check_ability functionality of reolink RLC-410W v3.0.0.136_20121102. The SetMdAlarm API sets the movement detection parameters, giving the ability to set the sensitivity of the camera per a range of hours, and which of the camera spaces to ignore when considering movement detection. Because in cgi_check_ability the SetMdAlarm API does not have a specific case, the user permission will default to 7. This will give non-administrative users the possibility to change the movement detection parameters.

NVD Source

Technical Analysis

CVE-2021-40414 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.1.