What is CVE-2021-37022?

CVE-2021-37022 is a critical-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-11-23.

How severe is CVE-2021-37022?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Huawei Harmonyos

CVE-2021-37022

There is a Heap-based Buffer Overflow vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability will cause root permission which can be escalated.

Vulnerability class: Buffer Overflow

Published 2021-11-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (59.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.000

Affected products

Huawei Harmonyos — versions 2.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

device.harmonyos.com/cn/docs/security/update/security-bulletins-202108-00000011… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-37022?: CVE-2021-37022 is a critical-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-11-23.
How severe is CVE-2021-37022?: Critical severity. CVSS v3 base score is 9.8 out of 10.