Is CVE-2021-40413 actively exploited?

No active exploitation of CVE-2021-40413 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40413 be exploited remotely?

Yes. CVE-2021-40413 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40413?

CVE-2021-40413 has a CVSS score of 7.1 (HIGH).

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HIGH

CVE-2021-40413

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 UpgradePrepare is the API that checks if a provided filename identifies a new version of the RLC-410W firmware. If the version is new, it would be possible, allegedly, to later on perform the Upgrade. An attacker can send an HTTP request to trigger this vulnerability.

NVD Source

Technical Analysis

CVE-2021-40413 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.