CVE-2020-10062 json
Packet length decoding error in MQTT
published 2020-06-05 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2527
- cvss
- 9.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.9%
- EPSS 2.9% chance of exploitation in 30 days, percentile 86%
- public exploits
- 0
- none known
Summary
An off-by-one error in the Zephyr project MQTT packet length decoder can result in memory corruption and possible remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
Patch / fix
Exploit prediction
2.88% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- zephyrproject-rtos zephyr
Classification
- Weakness
-
- CWE-193 Off-by-one Error
References
-
github.com
/zephyrproject-rtos/zephyr/pull/23821/commits/11b7a37d9a0b438270421b224221d91929843de4
patch, third-party-advisory
-
docs.zephyrproject.org
/latest/security/vulnerabilities.html#cve-2020-10062
vendor-advisory
-
zephyrprojectsec.atlassian.net
/browse/ZEPSEC-84
third-party-advisory
-
research.nccgroup.com
/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment
third-party-advisory
Sources
- CVE List CVE-2020-10062
- NVD CVE-2020-10062
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