CVE-2024-42936Public exploitNetwork attack vector

Remote code execution via modified MQTT messages

Published Jan 21, 2025 · Updated Mar 20, 2025

Code injection in Ruijie RG-EW300N firmware ReyeeOS 1.300.1422 allows remote attackers to execute shell commands via MQTT messages. The mqlink.elf service processes an intercepted, attacker-modified MQTT broker message as a shell command rather than treating its content strictly as data. No authentication or user interaction is required, but exploitation depends on intercepting and modifying traffic between the router and its MQTT broker.

CVSS severity9.8
Critical
EPSS probability1.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Ruijie RG-EW300N firmware ReyeeOS 1.300.1422 allows remote attackers to execute shell commands via MQTT messages. The mqlink.elf service processes an intercepted, attacker-modified MQTT broker message as a shell command rather than treating its content strictly as data. No authentication or user interaction is required, but exploitation depends on intercepting and modifying traffic between the router and its MQTT broker.

The record

CVE
CVE-2024-42936
Published
Jan 21, 2025
Updated
Mar 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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