How severe is CVE-2024-31036?

CVE-2024-31036 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2024-31036 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-31036?

CVE-2024-31036 affects Emqx Nanomq. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-31036?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-31036 have an EU (EUVD) identifier?

Yes. CVE-2024-31036 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-28953.

When was CVE-2024-31036 published?

CVE-2024-31036 was published on 2024-04-22 and last updated on 2026-06-17.

CVE-2024-31036

CVE-2024-31036 is a medium-severity vulnerability in Emqx Nanomq with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-28953
Weakness: CWE-122
Affected product: Emqx Nanomq
Published: 2024-04-22
Last modified: 2026-06-17

Description

A heap-buffer-overflow vulnerability in the read_byte function in NanoMQ v.0.21.7 allows attackers to cause a denial of service via transmission of crafted hexstreams.

Frequently asked questions

What is CVE-2024-31036?: A heap-buffer-overflow vulnerability in the read_byte function in NanoMQ v.0.21.7 allows attackers to cause a denial of service via transmission of crafted hexstreams.
How severe is CVE-2024-31036?: CVE-2024-31036 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2024-31036 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-31036?: CVE-2024-31036 affects Emqx Nanomq. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-31036?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-31036 have an EU (EUVD) identifier?: Yes. CVE-2024-31036 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-28953.
When was CVE-2024-31036 published?: CVE-2024-31036 was published on 2024-04-22 and last updated on 2026-06-17.

References

https://github.com/nanomq/nanomq/issues/1722

Affected products (1)

cpe:2.3:a:emqx:nanomq:0.21.7:*:*:*:*:*:*:*

More vulnerabilities in Emqx Nanomq

CVE-2025-59947 — Critical (CVSS 9.0): NanoMQ is a messaging broker/bus for IoT Edge & SDV. Versions prior to 0.24.4 have a buffer overflow case while the…
CVE-2024-42655 — High (CVSS 8.8): An access control issue in NanoMQ v0.21.10 allows attackers to bypass security restrictions and access sensitive system…
CVE-2023-34488 — High (CVSS 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…
CVE-2026-32135 — High (CVSS 7.5): NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Versions prior to 0.24.11 have a remotely…
CVE-2026-21888 — High (CVSS 7.5): NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing…
CVE-2024-48077 — High (CVSS 7.5): NanoMQ v0.22.7 is vulnerable to Denial of Service (DoS) due to improper resource throttling. A crafted sequence of…

All CVEs affecting Emqx Nanomq →

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities

CVE-2026-46752 — Critical (CVSS 10.0): Redis Lua HEAP overflow in cjson library vulnerability in Apache Kvrocks. This issue affects Apache Kvrocks: from…
CVE-2026-24822 — Critical (CVSS 10.0): Out-of-bounds Write, Heap-based Buffer Overflow vulnerability in ttttupup wxhelper (src modules). This vulnerability is…
CVE-2025-23123 — Critical (CVSS 10.0): A malicious actor with access to the management network could execute a remote code execution (RCE) by exploiting a…
CVE-2022-34819 — Critical (CVSS 10.0): A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions <…
CVE-2026-44050 — Critical (CVSS 9.9): A heap-based buffer overflow in the CNID daemon comm_rcv() function in Netatalk 2.0.0 through 4.4.2 allows a remote…
CVE-2026-49841 — Critical (CVSS 9.8): FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to…

Browse all CWE-122 (Heap-based Buffer Overflow) vulnerabilities →