PT-2025-31941 · Firstnum · Firstnum Jc21A-04

Actuator · Published 2025-08-05 · Updated 2025-08-05 · CVE-2025-43979

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions FIRSTNUM JC21A-04 devices versions through 2.01ME/FN

Description An issue allows authenticated attackers to execute arbitrary OS system commands with root privileges via crafted payloads to the xml action.cgi?method= endpoint.

Recommendations Update FIRSTNUM JC21A-04 devices to a version later than 2.01ME/FN.

Exploit

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2025-43979

Affected Products

Firstnum Jc21A-04

References · 5

• 🔥 https://github.com/actuator/cve/tree/main/Firstnum · Exploit
• 🔥 https://github.com/actuator/cve/blob/main/Firstnum/CVE-2025-43979.txt · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-43979 · Security Note
• https://t.me/CVEtracker/29214 · Telegram Post
• https://twitter.com/CVEnew/status/1952760583096312141 · Twitter Post