CVE-2021-3435

MEDIUMNVD 4.04.0—

4.0

Information leakage in le_ecred_conn_req(). Zephyr versions >= v2.4.0 Use of Uninitialized Resource (CWE-908). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-xhg3-gvj6-4rqh

CVSS v3: 4.0
EG Score: 4.0(medium)
EPSS: 17.2%
KEV: Not listed

Published

June 28, 2022

Last Modified

November 21, 2024

References (2)

vulnerabilities@zephyrprojecthttp://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-xhg3-gvj6-4rqh
af854a3a-2127-422b-91ae-364da2661108http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-xhg3-gvj6-4rqh

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-908Use of Uninitialized Resource

Data Freshness Timeline

(refreshed 11× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 19:42 UTCEG score recompute

Frequently asked(5)

What is CVE-2021-3435?

CVE-2021-3435 is a medium vulnerability published on June 28, 2022. Information leakage in leecredconn_req(). Zephyr versions >= v2.4.0 Use of Uninitialized Resource (CWE-908). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-xhg3-gvj6-4rqh

When was CVE-2021-3435 disclosed?

CVE-2021-3435 was first published in the National Vulnerability Database on June 28, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3435 actively exploited?

CVE-2021-3435 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3435?

CVE-2021-3435 has a CVSS v3 base score of 4.0 (NVD).

How do I remediate CVE-2021-3435?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3435, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-3435

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-3435?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)