CVE-2024-42936 Code injection in n/a

Critical 9.8 Published 21 Jan 2025 Updated 20 Mar 2025

Attackers can execute arbitrary code on Ruijie RG-EW300N routers by sending modified MQTT broker messages to the mqlink.elf service.

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-2024-42936?

CVE-2024-42936 is a critical code injection vulnerability in n/a, published on 21 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The mqlink.elf is service component in Ruijie RG-EW300N with firmware ReyeeOS 1.300.1422 is vulnerable to Remote Code Execution via a modified MQTT broker message.

Weakness: CWE-94

Which versions are affected by CVE-2024-42936?

It affects 1 product.

Products include Ruijie Reyee Os.

How do I fix CVE-2024-42936?

No fix has been published for CVE-2024-42936 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2024-42936 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-42936 exists.

Sources

Also known as GHSA-25fh-589c-4pcj.