CVE-2021-3329

CRITICALNVD 9.66.5▼

9.6

Lack of proper validation in HCI Host stack initialization can cause a crash of the bluetooth stack

CVSS v3: 9.6
EG Score: 6.5(medium)
EPSS: 24.5%
KEV: Not listed

Published

February 26, 2023

Last Modified

November 21, 2024

References (2)

vulnerabilities@zephyrprojecthttps://zephyrprojectsec.atlassian.net/browse/ZEPSEC-117
af854a3a-2127-422b-91ae-364da2661108https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-117

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 9× 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.

2026-05-27 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 06:11 UTCEG score recompute
2026-05-25 06:11 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-3329?

CVE-2021-3329 is a critical vulnerability published on February 26, 2023. Lack of proper validation in HCI Host stack initialization can cause a crash of the bluetooth stack

When was CVE-2021-3329 disclosed?

CVE-2021-3329 was first published in the National Vulnerability Database on February 26, 2023, 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-2021-3329 actively exploited?

CVE-2021-3329 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3329?

CVE-2021-3329 has a CVSS v3 base score of 9.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5.

How do I remediate CVE-2021-3329?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3329, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-3329

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Is Your Infrastructure Affected by CVE-2021-3329?

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CVE-2021-3329

📅 Published

🔄 Last Modified

🔗 References (2)