What is CVE-2021-3510?

CVE-2021-3510 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Attempt to Access Child of a Non-structure Pointer. CVSS score: 7.5/10. Published 2021-10-05.

How severe is CVE-2021-3510?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Zephyrproject Zephyr

CVE-2021-3510

Zephyr JSON decoder incorrectly decodes array of array. Zephyr versions >= >1.14.0, >= >2.5.0 contain Attempt to Access Child of a Non-structure Pointer (CWE-588). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-289f-7mw3-2qf4

Published 2021-10-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Zephyrproject Zephyr — versions 1.14.0, 1.14.1, 1.14.2
Zephyrproject-Rtos Zephyr — versions >1.14.0, >2.5.0

Weakness classification (CWE)

CWE-588 — Attempt to Access Child of a Non-structure Pointer

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-289f-7mw3-2qf4 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3510?: CVE-2021-3510 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Attempt to Access Child of a Non-structure Pointer. CVSS score: 7.5/10. Published 2021-10-05.
How severe is CVE-2021-3510?: High severity. CVSS v3 base score is 7.5 out of 10.