CVE-2019-19307: Cesanta Mongoose

Critical severity, CVSS 9.8. EPSS: 42.2% chance of exploitation in the next 30 days.

An integer overflow in parse_mqtt in mongoose.c in Cesanta Mongoose 6.16 allows an attacker to achieve remote DoS (infinite loop), or possibly cause an out-of-bounds write, by sending a crafted MQTT protocol packet.

Affected products

• Cesanta Mongoose: version 6.16 only

Published 2019-11-26. Last modified 2026-06-17.