CVE-2021-40021

High

Published: 10 January 2022

Published

10 January 2022

Modified

21 November 2024

KEV Added

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Patch

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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score 0.0019 40.4th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-40021 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Huawei Harmonyos. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 40.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The eID module has an out-of-bounds memory write vulnerability,Successful exploitation of this vulnerability may affect data confidentiality.

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

huawei

harmonyos

≤ 2.0

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.