CVE-2021-46839

CRITICALNVD 9.19.1—

9.1

The HW_KEYMASTER module has a vulnerability of missing bounds check on length.Successful exploitation of this vulnerability may cause malicious construction of data, which results in out-of-bounds access.

CVSS v3: 9.1
EG Score: 9.1(medium)
EPSS: 32.2%
KEV: Not listed

Published

October 14, 2022

Last Modified

May 15, 2025

References (4)

psirt@huaweihttps://consumer.huawei.com/en/support/bulletin/2022/10/
psirt@huaweihttps://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202210-0000001416095697
af854a3a-2127-422b-91ae-364da2661108https://consumer.huawei.com/en/support/bulletin/2022/10/
af854a3a-2127-422b-91ae-364da2661108https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202210-0000001416095697

Weakness Classification(1)

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

CWE-125Out-of-bounds Read

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

2026-06-07 15:23 UTCepss_batch
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2026-06-06 13:46 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
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2026-05-28 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2021-46839?

CVE-2021-46839 is a critical vulnerability published on October 14, 2022. The HW_KEYMASTER module has a vulnerability of missing bounds check on length.Successful exploitation of this vulnerability may cause malicious construction of data, which results in out-of-bounds access.

When was CVE-2021-46839 disclosed?

CVE-2021-46839 was first published in the National Vulnerability Database on October 14, 2022, with the most recent update on May 15, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-46839 actively exploited?

CVE-2021-46839 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-46839?

CVE-2021-46839 has a CVSS v3 base score of 9.1 (NVD).

How do I remediate CVE-2021-46839?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-46839, 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.

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CVE-2021-46839

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-46839?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)