How severe is CVE-2021-40019?

CVE-2021-40019 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2021-40019 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-2021-40019?

CVE-2021-40019 primarily affects Huawei Emui. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40019?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-40019 published?

CVE-2021-40019 was published on 2022-09-16 and last updated on 2026-06-17.

CVE-2021-40019

CVE-2021-40019 is a critical-severity vulnerability in Huawei Emui with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Huawei Emui
Published: 2022-09-16
Last modified: 2026-06-17

Description

Out-of-bounds heap read vulnerability in the HW_KEYMASTER module. Successful exploitation of this vulnerability may cause out-of-bounds access.

Frequently asked questions

What is CVE-2021-40019?: Out-of-bounds heap read vulnerability in the HW_KEYMASTER module. Successful exploitation of this vulnerability may cause out-of-bounds access.
How severe is CVE-2021-40019?: CVE-2021-40019 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2021-40019 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-2021-40019?: CVE-2021-40019 primarily affects Huawei Emui. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40019?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-40019 published?: CVE-2021-40019 was published on 2022-09-16 and last updated on 2026-06-17.

References

https://consumer.huawei.com/en/support/bulletin/2022/9/

Affected products (5)

cpe:2.3:o:huawei:emui:10.1.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:10.1.1:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:12.0.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:3.1.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:3.1.1:*:*:*:*:*:*:*

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