In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-85
https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment
https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/0b39cbf3c01d7feec9d0dd7cc7e0e374b6113542
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10070
Source: Mitre, NVD
Published: 2020-06-05
Updated: 2026-06-17
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.06474