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HIGH

CVE-2021-21906

CVSS v3

7.2

HIGH

EPSS Score

1.0 %

exploit probability, as of 2026-10-15

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2021-21906 yet.

Full record on NVD

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.

Technical details

Published
2021-12-22

Frequently asked questions

What is CVE-2021-21906?

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.

Is CVE-2021-21906 actively exploited?

Active exploitation of CVE-2021-21906 has not been confirmed. Its EPSS score was 1.0% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

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

CVE-2021-21906 has a CVSS v3 base score of 7.2 (HIGH severity).

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