What is CVE-2021-22421?

CVE-2021-22421 is a high-severity vulnerability in Huawei Harmonyos, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-08-03.

How severe is CVE-2021-22421?

High severity. CVSS v3 base score is 7.8 out of 10.

Privilege escalation in Huawei Harmonyos

CVE-2021-22421

A component of the HarmonyOS has a Improper Privilege Management vulnerability. Local attackers may exploit this vulnerability to cause further Elevation of Privileges.

Vulnerability class: Privilege Escalation

Published 2021-08-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (4.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Huawei Harmonyos — versions 2.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

device.harmonyos.com/cn/docs/security/update/oem_security_update_phone_202106-0… (Not Applicable, Vendor Advisory)

Frequently asked questions

What is CVE-2021-22421?: CVE-2021-22421 is a high-severity vulnerability in Huawei Harmonyos, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-08-03.
How severe is CVE-2021-22421?: High severity. CVSS v3 base score is 7.8 out of 10.