Cyber Resilience

CVE-2021-46840

Critical

Published: 14 October 2022

Published
14 October 2022
Modified
15 May 2025
KEV Added
—
Patch
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CVSS Score v3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0013 32.2th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-46840 is a critical-severity Out-of-bounds Read (CWE-125) vulnerability in Huawei Emui. Its CVSS base score is 9.1 (Critical).

Operationally, ranked at the 32.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

The HW_KEYMASTER module has an out-of-bounds access vulnerability in parameter set verification.Successful exploitation of this vulnerability may cause malicious construction of data, which results in out-of-bounds access.

CWE(s)
CWE-125

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

huawei
emui
11.0.1, 12.0.0
huawei
harmonyos
2.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References