CVE-2025-43979

Name: CVE-2025-43979
Creator: NVD / NIST
Published: 2025-08-05T16:15:29.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 4.97%

Last modified Jun 17, 2026

CVE-2025-43979 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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.. EPSS estimates a 4.97% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

4.97%

91.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

References

Timeline

Published: Aug 5, 2025
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2025-43979?

How severe is CVE-2025-43979?

CVE-2025-43979 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 4.97% probability of exploitation in the next 30 days.

How do I fix CVE-2025-43979?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-43979?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST