How severe is CVE-2021-40055?

CVE-2021-40055 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-40055 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40055?

CVE-2021-40055 primarily affects Huawei Emui. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40055?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-40055 published?

CVE-2021-40055 was published on 2022-03-10 and last updated on 2026-06-17.

CVE-2021-40055

CVE-2021-40055 is a medium-severity vulnerability in Huawei Emui with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 7.1
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Huawei Emui
Published: 2022-03-10
Last modified: 2026-06-17

Description

There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.

Frequently asked questions

What is CVE-2021-40055?: There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.
How severe is CVE-2021-40055?: CVE-2021-40055 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-40055 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40055?: CVE-2021-40055 primarily affects Huawei Emui. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40055?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40055 published?: CVE-2021-40055 was published on 2022-03-10 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:o:huawei:emui:10.0.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:10.1.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:10.1.1:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:11.0.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:11.0.1:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:12.0.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:harmonyos:2.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:3.0.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:3.1.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:3.1.1:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:4.0.0:*:*:*:*:*:*:*

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