CVE-2024-42655

HIGHNVD 8.88.8—Elevated

8.8

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.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 48.9%
KEV: Not listed

Published

July 29, 2025

Last Modified

August 6, 2025

References (3)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-284Improper Access Control

Data Freshness Timeline

(refreshed 14× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-30 01:10 UTCEG score recompute
2026-05-30 01:10 UTCGHSA enrichment
2026-05-29 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2024-42655?

CVE-2024-42655 is a high vulnerability published on July 29, 2025. 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.

When was CVE-2024-42655 disclosed?

CVE-2024-42655 was first published in the National Vulnerability Database on July 29, 2025, with the most recent update on August 6, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-42655 actively exploited?

CVE-2024-42655 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-42655?

CVE-2024-42655 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2024-42655?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-42655, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-42655

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Is Your Infrastructure Affected by CVE-2024-42655?

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Frequently asked(5)

What is CVE-2024-42655?

When was CVE-2024-42655 disclosed?

Is CVE-2024-42655 actively exploited?

What is the CVSS score of CVE-2024-42655?

CVE-2024-42655 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2024-42655?

CVE-2024-42655

📅 Published

🔄 Last Modified

🔗 References (3)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-42655?

CVE-2024-42655

📅 Published

🔄 Last Modified

🔗 References (3)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-42655?

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References (3)

Frequently asked(5)

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References (3)

Frequently asked(5)

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