Is CVE-2021-40416 actively exploited?

No active exploitation of CVE-2021-40416 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40416 be exploited remotely?

Yes. CVE-2021-40416 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40416?

CVE-2021-40416 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2021-40416

HIGH

CVE-2021-40416

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

8.8

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. All the Get APIs that are not included in cgi_check_ability are already executable by any logged-in users. An attacker can send an HTTP request to trigger this vulnerability.

NVD Source

Technical Analysis

CVE-2021-40416 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.