CVE-2025-43979 Command injection in n/a
Authenticated attackers can execute arbitrary OS commands with root privileges on FIRSTNUM JC21A-04 devices via crafted payloads.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-43979?
CVE-2025-43979 is a high-severity command injection vulnerability in n/a, published on 5 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2025-43979?
How do I fix CVE-2025-43979?
No fix has been published for CVE-2025-43979 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-43979 being exploited?
There is no known exploitation of CVE-2025-43979 in the wild and no public exploit code.
Sources
Also known as GHSA-fmvc-vq6r-76m5.