What is CVE-2024-42936?

CVE-2024-42936 is a critical-severity vulnerability in Ruijie Reyee OS, classified under Code Injection. CVSS score: 9.8/10. Published 2025-01-21.

How severe is CVE-2024-42936?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Ruijie Reyee OS

CVE-2024-42936

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.

Vulnerability class: RCE (Remote Code Execution)

Published 2025-01-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Ruijie Reyee OS — versions 1.300.1422
Ruijie Rg-Ew300n

Weakness classification (CWE)

CWE-94 — Code Injection

References

gist.github.com/smrx86/2008111b12ab47882b3928d0cbc9e415 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-42936?: CVE-2024-42936 is a critical-severity vulnerability in Ruijie Reyee OS, classified under Code Injection. CVSS score: 9.8/10. Published 2025-01-21.
How severe is CVE-2024-42936?: Critical severity. CVSS v3 base score is 9.8 out of 10.