Cyber Resilience

CVE-2024-42646

HighPublic PoC

Published: 14 July 2025

Published
14 July 2025
Modified
16 July 2025
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0040 61.1th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-42646 is a high-severity Out-of-bounds Read (CWE-125) vulnerability in Emqx Nanomq. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked in the top 38.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A segmentation fault in NanoMQ v0.21.10 allows attackers to cause a Denial of Service (DoS) via crafted messages.

CWE(s)
NVD-CWE-noinfoCWE-125

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

The CVE describes a segmentation fault in NanoMQ triggered by crafted MQTT messages, enabling adversaries to exploit the application for endpoint denial of service (T1499.004).

Affected Assets

emqx
nanomq
0.21.10

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References