How severe is CVE-2021-22456?

CVE-2021-22456 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22456?

CVE-2021-22456 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22456 published?

CVE-2021-22456 was published on 2021-10-28 and last updated on 2026-06-17.

CVE-2021-22456

CVE-2021-22456 is a medium-severity vulnerability in Huawei Harmonyos with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Huawei Harmonyos
Published: 2021-10-28
Last modified: 2026-06-17

Description

A component of the HarmonyOS has a Data Processing Errors vulnerability. Local attackers may exploit this vulnerability to cause Kernel System unavailable.

Frequently asked questions

What is CVE-2021-22456?: A component of the HarmonyOS has a Data Processing Errors vulnerability. Local attackers may exploit this vulnerability to cause Kernel System unavailable.
How severe is CVE-2021-22456?: CVE-2021-22456 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22456?: CVE-2021-22456 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22456 published?: CVE-2021-22456 was published on 2021-10-28 and last updated on 2026-06-17.

References

https://device.harmonyos.com/cn/docs/security/update/security-bulletins-202107-0000001123874808

Affected products (1)

cpe:2.3:o:huawei:harmonyos:2.0:*:*:*:*:*:*:*

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