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CVE-2021-3510

24
FAUCET Score

CVE-2021-3510 describes an incorrect JSON array decoding vulnerability in Zephyr RTOS versions 1.14.0 and 2.5.0 and later, leading to an attempt to access a child of a non-structure pointer (CWE-588). This vulnerability carries a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, potentially leading to high availability impact. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.14.0CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:1.14.0:-:*:*:*:*:*:*
1.14.0CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:1.14.0:rc1:*:*:*:*:*:*
1.14.0CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:1.14.0:rc2:*:*:*:*:*:*
1.14.0CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:1.14.0:rc3:*:*:*:*:*:*
1.14.1CPE matchmatch criteria
cpe:2.3:o:zephyrproject:zephyr:1.14.1:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.93%
Probability of exploitation in next 30 days
EPSS Percentile
56.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0093 is in the 32nd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / zephyrproject-rtos/zephyr/security/advisories/GHSA-289f-7mw3-2qf4
PatchThird Party Advisory