p PatchFirst

CVE-2026-101003

CVE-2026-101003 · Cesanta Mongoose MQTT Broker main.c fn stack-based overflow

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.9 · Medium · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • mongoose

    Versions
    • 7.0: Affected
    • 7.1: Affected
    • 7.2: Affected
    • 7.3: Affected
    • 7.4: Affected
    • 7.5: Affected
    • 7.6: Affected
    • 7.7: Affected
    • 7.8: Affected
    • 7.9: Affected
    • 7.10: Affected
    • 7.11: Affected
    • 7.12: Affected
    • 7.13: Affected
    • 7.14: Affected
    • 7.15: Affected
    • 7.16: Affected
    • 7.17: Affected
    • 7.18: Affected
    • 7.19: Affected
    • 7.20: Affected
    • 7.21: Affected
    • 7.22: Not affected

    No fix published

  • mongoose Debian:14

    Versions
    • 7.21+ds-1
    • 7.21+ds-1~bpo13+1
    • 7.21+ds-2
    • 7.22+ds-1~bpo13+1
    Affected ranges
    • ECOSYSTEM: < 7.22+ds-1

    Update to 7.22+ds-1

  • mongoose Ubuntu:26.10

    Versions
    • 7.21+ds-1
    • 7.21+ds-2
    • 7.22+ds-1
    • 7.23+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →