RCE in N/a

CVE-2025-43979

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.065 (93.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-43979: rose from 0.055 to 0.065.

EPSS over last 30 days · oldest: 0.055 · newest: 0.065 · change: +0.009

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-43979?
CVE-2025-43979 is a high-severity vulnerability in N/a, classified under OS Command Injection. CVSS score: 7.4/10. Published 2025-08-05.
How severe is CVE-2025-43979?
High severity. CVSS v3 base score is 7.4 out of 10.
Is CVE-2025-43979 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.