CVE-2025-56353 describes a memory leak vulnerability in tinyMQTT, specifically in commit 6226ade15bd4f97be2d196352e64dd10937c1962. An unauthenticated attacker can exploit this by sending repeated subscription requests with malformed UTF-8 topic filters, causing the broker to allocate memory without freeing it. This leads to unbounded heap growth and a high-severity denial-of-service (DoS) risk, as indicated by its CVSS score of 7.5. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2024-02-18CPE matchmatch criteria | cpe:2.3:a:justdoit0910:tinymqtt:2024-02-18:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.