CVE-2021-3510 | Zephyr JSON decoder incorrectly decodes array of array

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 update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-3510 is rated Moderate Risk (48/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.32%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-3510

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.38% 0.32% -0.06%
2 2025-03-29 0.32% 0.38% +0.06%
3 2025-03-17 — 0.32% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-3510

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2021-3510

Affected software / configurations for CVE-2021-3510

Vendor Product Version Raw CPE
zephyrproject zephyr 1.14.0 cpe:2.3:o:zephyrproject:zephyr:1.14.0:-:*:*:*:*:*:*
zephyrproject zephyr 1.14.0 cpe:2.3:o:zephyrproject:zephyr:1.14.0:rc1:*:*:*:*:*:*
zephyrproject zephyr 1.14.0 cpe:2.3:o:zephyrproject:zephyr:1.14.0:rc2:*:*:*:*:*:*
zephyrproject zephyr 1.14.0 cpe:2.3:o:zephyrproject:zephyr:1.14.0:rc3:*:*:*:*:*:*
zephyrproject zephyr 1.14.1 cpe:2.3:o:zephyrproject:zephyr:1.14.1:-:*:*:*:*:*:*
zephyrproject zephyr 1.14.1 cpe:2.3:o:zephyrproject:zephyr:1.14.1:rc1:*:*:*:*:*:*
zephyrproject zephyr 1.14.1 cpe:2.3:o:zephyrproject:zephyr:1.14.1:rc2:*:*:*:*:*:*
zephyrproject zephyr 1.14.1 cpe:2.3:o:zephyrproject:zephyr:1.14.1:rc3:*:*:*:*:*:*
zephyrproject zephyr 1.14.2 cpe:2.3:o:zephyrproject:zephyr:1.14.2:*:*:*:*:*:*:*
zephyrproject zephyr 1.14.3 cpe:2.3:o:zephyrproject:zephyr:1.14.3:rc1:*:*:*:*:*:*
zephyrproject zephyr 1.14.3 cpe:2.3:o:zephyrproject:zephyr:1.14.3:rc2:*:*:*:*:*:*
zephyrproject zephyr 2.5.0 cpe:2.3:o:zephyrproject:zephyr:2.5.0:-:*:*:*:*:*:*
zephyrproject zephyr 2.5.0 cpe:2.3:o:zephyrproject:zephyr:2.5.0:rc1:*:*:*:*:*:*
zephyrproject zephyr 2.5.0 cpe:2.3:o:zephyrproject:zephyr:2.5.0:rc2:*:*:*:*:*:*
zephyrproject zephyr 2.5.0 cpe:2.3:o:zephyrproject:zephyr:2.5.0:rc3:*:*:*:*:*:*
zephyrproject zephyr 2.5.0 cpe:2.3:o:zephyrproject:zephyr:2.5.0:rc4:*:*:*:*:*:*
zephyrproject zephyr 2.5.1 cpe:2.3:o:zephyrproject:zephyr:2.5.1:rc1:*:*:*:*:*:*
zephyrproject zephyr 2.6.0 cpe:2.3:o:zephyrproject:zephyr:2.6.0:-:*:*:*:*:*:*
zephyrproject zephyr 2.6.0 cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc1:*:*:*:*:*:*
zephyrproject zephyr 2.6.0 cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc2:*:*:*:*:*:*
zephyrproject zephyr 2.6.0 cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc3:*:*:*:*:*:*
zephyrproject zephyr 2.6.1 cpe:2.3:o:zephyrproject:zephyr:2.6.1:rc1:*:*:*:*:*:*

References for CVE-2021-3510

cvelogic Threat Intelligence