What is CVE-2021-40036?

CVE-2021-40036 is a critical-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-06-13.

How severe is CVE-2021-40036?

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

Buffer overflow in Huawei Harmonyos

CVE-2021-40036

The bone voice ID TA has a memory overwrite vulnerability. Successful exploitation of this vulnerability may result in malicious code execution.

Vulnerability class: Buffer Overflow

Published 2022-06-13 · 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 (61.9th percentile), scored 2026-10-08.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

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

Affected products

Huawei Harmonyos
Harmonyos — versions HarmonyOS 2.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

device.harmonyos.com/en/docs/security/update/security-bulletins-202201-00000012… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-40036?: CVE-2021-40036 is a critical-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-06-13.
How severe is CVE-2021-40036?: Critical severity. CVSS v3 base score is 9.8 out of 10.