CVE-2024-42655

HIGH
Published Jul 29, 2025 Modified Aug 6, 2025 CWE-284

Description

An access control issue in NanoMQ v0.21.10 allows attackers to bypass security restrictions and access sensitive system topic messages using MQTT wildcard characters.

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CVSS v3.1 Score

8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-284 CWE-284

Affected Products

Vendor Product
emqx nanomq

References

Frequently Asked Questions

What is CVE-2024-42655? +
An access control issue in NanoMQ v0.21.10 allows attackers to bypass security restrictions and access sensitive system topic messages using MQTT wildcard characters. It has a CVSS v3.1 base score of 8.8 (HIGH).
How severe is CVE-2024-42655? +
CVE-2024-42655 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-42655? +
CVE-2024-42655 affects products from emqx, specifically: nanomq. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-42655? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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