How severe is CVE-2021-21903?

CVE-2021-21903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21903?

CVE-2021-21903 affects Garrett Ic Module Cma. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-21903 published?

CVE-2021-21903 was published on 2021-12-22 and last updated on 2026-06-17.

CVE-2021-21903

CVE-2021-21903 is a critical-severity vulnerability in Garrett Ic Module Cma with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Garrett Ic Module Cma
Published: 2021-12-22
Last modified: 2026-06-17

Description

A stack-based buffer overflow vulnerability exists in the CMA check_udp_crc function of Garrett Metal Detectors’ iC Module CMA Version 5.0. A specially-crafted packet can lead to a stack-based buffer overflow during a call to strcpy. An attacker can send a malicious packet to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-21903?: A stack-based buffer overflow vulnerability exists in the CMA check_udp_crc function of Garrett Metal Detectors’ iC Module CMA Version 5.0. A specially-crafted packet can lead to a stack-based buffer overflow during a call to strcpy. An attacker can send a malicious packet to trigger this vulnerability.
How severe is CVE-2021-21903?: CVE-2021-21903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21903?: CVE-2021-21903 affects Garrett Ic Module Cma. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-21903 published?: CVE-2021-21903 was published on 2021-12-22 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1355

Affected products (1)

cpe:2.3:o:garrett:ic_module_cma:5.0:*:*:*:*:*:*:*

More vulnerabilities in Garrett Ic Module Cma

CVE-2021-21901 — High (CVSS 8.8): A stack-based buffer overflow vulnerability exists in the CMA check_udp_crc function of Garrett Metal Detectors’ iC…
CVE-2021-21902 — High (CVSS 8.1): An authentication bypass vulnerability exists in the CMA run_server_6877 functionality of Garrett Metal Detectors iC…
CVE-2021-21906 — High (CVSS 7.2): Stack-based buffer overflow vulnerability exists in how the CMA readfile function of Garrett Metal Detectors iC Module…
CVE-2021-21905 — High (CVSS 7.2): Stack-based buffer overflow vulnerability exists in how the CMA readfile function of Garrett Metal Detectors iC Module…
CVE-2021-21904 — High (CVSS 7.2): A directory traversal vulnerability exists in the CMA CLI setenv command of Garrett Metal Detectors’ iC Module CMA…
CVE-2021-21907 — Medium (CVSS 4.9): A directory traversal vulnerability exists in the CMA CLI getenv command functionality of Garrett Metal Detectors’ iC…

All CVEs affecting Garrett Ic Module Cma →

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