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Vulnerability record · CVE-2025-43979 · published 5 August 2025

CVE-2025-43979: OS command injection vulnerability

An issue was discovered on FIRSTNUM JC21A-04 devices through 2.01ME/FN that allows authenticated attackers to execute arbitrary OS system commands with root privileges via crafted payloads to the xml_action.cgi?method= endpoint.

7.4 CVSS 3.1 High EPSS 6.3% · top 6.6% CWE-78 · OS command injection Deferred
7.4CVSS 3.1 base score
6.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

An issue was discovered on FIRSTNUM JC21A-04 devices through 2.01ME/FN that allows authenticated attackers to execute arbitrary OS system commands with root privileges via crafted payloads to the xml_action.cgi?method= endpoint.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

LinkTags
https://github.com/actuator/cve/blob/main/Firstnum/CVE-2025-43979.txt
https://github.com/actuator/cve/tree/main/Firstnum

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Source: NIST National Vulnerability Database (record CVE-2025-43979), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.