CVE-2020-10071: Zephyrproject Zephyr

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

The Zephyr MQTT parsing code performs insufficient checking of the length field on publish messages, allowing a buffer overflow and potentially remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

Affected products

• Zephyrproject Zephyr: up to and including 2.2.0

Published 2020-06-05. Last modified 2026-06-17.