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CVE-2025-56353

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

tinyMQTT是0x7C9A个人开发者的一个预排序树遍历算法库。 tinyMQTT存在安全漏洞，该漏洞源于代理未能验证或拒绝主题过滤器中的畸形UTF-8字符串，可能导致内存泄漏和拒绝服务。

AI Predicted 5.3 Difficulty: Easy EPSS 0.33% · P24
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I. Basic Information for CVE-2025-56353

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In tinyMQTT commit 6226ade15bd4f97be2d196352e64dd10937c1962 (2024-02-18), a memory leak occurs due to the broker's failure to validate or reject malformed UTF-8 strings in topic filters. An attacker can exploit this by sending repeated subscription requests with arbitrarily large or invalid filter payloads. Each request causes memory to be allocated for the malformed topic filter, but the broker does not free the associated memory, leading to unbounded heap growth and potential denial of service under sustained attack.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
tinyMQTT 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tinyMQTT是0x7C9A个人开发者的一个预排序树遍历算法库。 tinyMQTT存在安全漏洞，该漏洞源于代理未能验证或拒绝主题过滤器中的畸形UTF-8字符串，可能导致内存泄漏和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2025-56353

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III. Intelligence Information for CVE-2025-56353

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Same Patch Batch · n/a · 2026-01-20 · 20 CVEs total

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IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2025-56353

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