How severe is CVE-2024-10525?

CVE-2024-10525 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-10525 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 58% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-10525?

CVE-2024-10525 affects Eclipse Mosquitto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-10525?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-10525 have an EU (EUVD) identifier?

Yes. CVE-2024-10525 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-33469.

When was CVE-2024-10525 published?

CVE-2024-10525 was published on 2024-10-30 and last updated on 2026-06-17.

CVE-2024-10525

CVE-2024-10525 is a critical-severity vulnerability in Eclipse Mosquitto with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 58% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 7.2
EPSS exploit prediction: 58% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-33469
Weakness: CWE-787
Affected product: Eclipse Mosquitto
Published: 2024-10-30
Last modified: 2026-06-17

Description

In Eclipse Mosquitto, from version 1.3.2 through 2.0.18, if a malicious broker sends a crafted SUBACK packet with no reason codes, a client using libmosquitto may make out of bounds memory access when acting in its on_subscribe callback. This affects the mosquitto_sub and mosquitto_rr clients.

Frequently asked questions

What is CVE-2024-10525?: In Eclipse Mosquitto, from version 1.3.2 through 2.0.18, if a malicious broker sends a crafted SUBACK packet with no reason codes, a client using libmosquitto may make out of bounds memory access when acting in its on_subscribe callback. This affects the mosquitto_sub and mosquitto_rr clients.
How severe is CVE-2024-10525?: CVE-2024-10525 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-10525 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 58% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-10525?: CVE-2024-10525 affects Eclipse Mosquitto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-10525?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-10525 have an EU (EUVD) identifier?: Yes. CVE-2024-10525 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-33469.
When was CVE-2024-10525 published?: CVE-2024-10525 was published on 2024-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*

More vulnerabilities in Eclipse Mosquitto

CVE-2018-12551 — High (CVSS 8.1): When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any…
CVE-2018-12550 — High (CVSS 8.1): When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty,…
CVE-2024-8376 — High (CVSS 7.5): In Eclipse Mosquitto up to version 2.0.18a, an attacker can achieve memory leaking, segmentation fault or…
CVE-2023-5632 — High (CVSS 7.5): In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data…
CVE-2023-28366 — High (CVSS 7.5): The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a…
CVE-2021-41039 — High (CVSS 7.5): In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property…

All CVEs affecting Eclipse Mosquitto →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

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CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

109.50.185.153 (ipv4-addr)
182.95.185.158 (ipv4-addr)
182.95.101.182 (ipv4-addr)
182.76.86.130 (ipv4-addr)
128.185.201.170 (ipv4-addr)
125.19.157.158 (ipv4-addr)
98.122.215.23 (ipv4-addr)
27.123.111.110 (ipv4-addr)