CVE-2023-34488

HIGHNVD 7.87.8—Elevated

7.8

NanoMQ 0.17.5 has a one-byte heap-based buffer over-read in the conn_handler function of mqtt_parser.c when it processes malformed messages.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 30.9%
KEV: Not listed

Published

June 12, 2023

Last Modified

September 24, 2025

References (2)

cve@mitrehttps://github.com/emqx/nanomq/issues/1181
af854a3a-2127-422b-91ae-364da2661108https://github.com/emqx/nanomq/issues/1181

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

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Frequently asked(5)

What is CVE-2023-34488?

CVE-2023-34488 is a high vulnerability published on June 12, 2023. NanoMQ 0.17.5 has a one-byte heap-based buffer over-read in the connhandler function of mqttparser.c when it processes malformed messages.

When was CVE-2023-34488 disclosed?

CVE-2023-34488 was first published in the National Vulnerability Database on June 12, 2023, with the most recent update on September 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-34488 actively exploited?

CVE-2023-34488 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-34488?

CVE-2023-34488 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2023-34488?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-34488, 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

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Frequently asked(5)

What is CVE-2023-34488?

When was CVE-2023-34488 disclosed?

Is CVE-2023-34488 actively exploited?

What is the CVSS score of CVE-2023-34488?

CVE-2023-34488 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2023-34488?

CVE-2023-34488

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-34488?

CVE-2023-34488

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-34488?

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References (2)

Frequently asked(5)

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References (2)

Frequently asked(5)

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