CVE-2021-40045

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-02-09 · updated 2026-06-17
Weakness: CWE-347

Description

There is a vulnerability of signature verification mechanism failure in system upgrade through recovery mode.Successful exploitation of this vulnerability may affect service confidentiality.

Affected products

Huawei EMUI: 11.0.0, 11.0.1, 12.0.0
Huawei HarmonyOS: before 2.0 — fixed in 2.0
Huawei Magic UI: 4.0.0

How to fix

Upgrade to a fixed version: Huawei HarmonyOS 2.0. Check the vendor advisory for mitigations.

References

https://consumer.huawei.com/en/support/bulletin/2022/2/
https://device.harmonyos.com/en/docs/security/update/security-bulletins-202202-0000001204253396
https://consumer.huawei.com/en/support/bulletin/2022/2/
https://device.harmonyos.com/en/docs/security/update/security-bulletins-202202-0000001204253396

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