Is CVE-2021-21906 actively exploited?

No active exploitation of CVE-2021-21906 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21906 be exploited remotely?

Yes. CVE-2021-21906 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-21906?

CVE-2021-21906 has a CVSS score of 7.2 (HIGH).

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HIGH

CVE-2021-21906

CWE-121Published: December 22, 2021· Updated: Jun 17, 2026

7.2

CVSS v3.1

Official Description

Stack-based buffer overflow vulnerability exists in how the CMA readfile function of Garrett Metal Detectors iC Module CMA Version 5.0 is used at various locations. The Garrett iC Module exposes an authenticated CLI over TCP port 6877. This interface is used by a secondary GUI client, called “CMA Connect”, to interact with the iC Module on behalf of the user. Every time a user submits a password to the CLI password prompt, the buffer containing their input is passed as the password parameter to the checkPassword function.

NVD Source

Technical Analysis

CVE-2021-21906 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high 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 7.2.