How severe is CVE-2021-39985?

CVE-2021-39985 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 none, integrity none, and availability high.

Is CVE-2021-39985 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39985?

CVE-2021-39985 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39985?

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-2021-39985 published?

CVE-2021-39985 was published on 2022-01-03 and last updated on 2026-06-17.

CVE-2021-39985

CVE-2021-39985 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-129.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-129
Affected product: Huawei Harmonyos
Published: 2022-01-03
Last modified: 2026-06-17

Description

The HwNearbyMain module has a Improper Validation of Array Index vulnerability.Successful exploitation of this vulnerability may cause a process to restart.

Frequently asked questions

What is CVE-2021-39985?: The HwNearbyMain module has a Improper Validation of Array Index vulnerability.Successful exploitation of this vulnerability may cause a process to restart.
How severe is CVE-2021-39985?: CVE-2021-39985 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 none, integrity none, and availability high.
Is CVE-2021-39985 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39985?: CVE-2021-39985 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39985?: 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-2021-39985 published?: CVE-2021-39985 was published on 2022-01-03 and last updated on 2026-06-17.

References

https://device.harmonyos.com/en/docs/security/update/security-bulletins-202111-0000001217889667

Affected products (1)

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

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