How severe is CVE-2021-40027?

CVE-2021-40027 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40027?

CVE-2021-40027 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40027?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40027 published?

CVE-2021-40027 was published on 2022-01-10 and last updated on 2026-06-17.

CVE-2021-40027

CVE-2021-40027 is a high-severity vulnerability in Huawei Harmonyos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Huawei Harmonyos
Published: 2022-01-10
Last modified: 2026-06-17

Description

The bone voice ID TA has a vulnerability in calculating the buffer length,Successful exploitation of this vulnerability may affect data confidentiality.

Frequently asked questions

What is CVE-2021-40027?: The bone voice ID TA has a vulnerability in calculating the buffer length,Successful exploitation of this vulnerability may affect data confidentiality.
How severe is CVE-2021-40027?: CVE-2021-40027 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40027?: CVE-2021-40027 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40027?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40027 published?: CVE-2021-40027 was published on 2022-01-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:huawei:harmonyos:*:*:*:*:*:*:*:*

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