CVE-2017-2894: Cesanta Mongoose

Critical severity, CVSS 9.8. EPSS: 31% chance of exploitation in the next 30 days.

An exploitable stack buffer overflow vulnerability exists in the MQTT packet parsing functionality of Cesanta Mongoose 6.8. A specially crafted MQTT SUBSCRIBE packet can cause a stack buffer overflow resulting in remote code execution. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.

Affected products

• Cesanta Mongoose: version 6.8 only

Published 2017-11-07. Last modified 2026-06-17.