CVE-2026-101003
Cesanta Mongoose MQTT Broker main.c fn stack-based overflow
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.22 addresses this issue. This patch is called a9df523f76f43a38bd53b4232b9cfd4c16869e71. Upgrading the affected component is advised.
| CWE | CWE-121 CWE-119 |
| Vendor | cesanta |
| Product | mongoose |
| Published | Sep 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Cesanta / Mongoose
7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 7.20 7.21
References
vuldb.com: https://vuldb.com/vuln/410873 vuldb.com: https://vuldb.com/vuln/410873/cti vuldb.com: https://vuldb.com/cve/CVE-2026-101003 vuldb.com: https://vuldb.com/submit/920005 github.com: https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71 github.com: https://github.com/cesanta/mongoose/releases/tag/7.22 github.com: https://github.com/cesanta/mongoose/
Credits
🔍 nemo2533 (VulDB User) VulDB Vulnerability Moderation Team