CVE-2021-35402 Command injection in PRC2402M

Critical 10.0 Published 20 Feb 2026 Updated 23 Feb 2026

An attacker can execute arbitrary OS commands on PROLiNK PRC2402M routers via the satellite_status ip parameter.

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-2021-35402?

CVE-2021-35402 is a critical command injection vulnerability in PROLiNK PRC2402M, published on 20 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

PROLiNK PRC2402M 20190909 before 2021-06-13 allows live_api.cgi?page=satellite_list OS command injection via shell metacharacters in the ip parameter (for satellite_status).

Weakness: CWE-78

Which versions are affected by CVE-2021-35402?

How do I fix CVE-2021-35402?

No fix has been published for CVE-2021-35402 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-2021-35402 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-35402 exists.

Sources

Also known as GHSA-68g8-2724-hq79.