CVE-2024-42649Public exploitNetwork attack vector

Denial of service via unreleased PUBLISH allocations

Published Jul 14, 2025 · Updated Jul 16, 2025

Memory leak in EMQX NanoMQ 0.22.10 allows remote attackers to exhaust broker memory via crafted MQTT PUBLISH messages. The broker's PUBLISH-message processing allocates heap memory for malformed packet data but never releases the allocation. Unauthenticated MQTT access permits repeated triggering, progressively consuming memory until the broker service is interrupted.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in EMQX NanoMQ 0.22.10 allows remote attackers to exhaust broker memory via crafted MQTT PUBLISH messages. The broker's PUBLISH-message processing allocates heap memory for malformed packet data but never releases the allocation. Unauthenticated MQTT access permits repeated triggering, progressively consuming memory until the broker service is interrupted.

The record

CVE
CVE-2024-42649
Published
Jul 14, 2025
Updated
Jul 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-401, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 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

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

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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