What is CVE-2021-39985?

CVE-2021-39985 is a high-severity vulnerability in Huawei Harmonyos, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2022-01-03.

How severe is CVE-2021-39985?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Huawei Harmonyos

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.

Published 2022-01-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Huawei Harmonyos — versions 2.0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

device.harmonyos.com/en/docs/security/update/security-bulletins-202111-00000012… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-39985?: CVE-2021-39985 is a high-severity vulnerability in Huawei Harmonyos, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2022-01-03.
How severe is CVE-2021-39985?: High severity. CVSS v3 base score is 7.5 out of 10.