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.

Published: 2022-09-16 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-40019 is rated Moderate Risk (50.2/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-40019

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.24% 0.50% +0.27%
2 2025-09-21 0.27% 0.24% -0.03%
3 2025-09-17 — 0.27% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-40019

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]

Weakness enumeration for CVE-2021-40019

Affected software / configurations for CVE-2021-40019

Vendor Product Version Raw CPE
huawei emui 10.1.0 cpe:2.3:o:huawei:emui:10.1.0:*:*:*:*:*:*:*
huawei emui 10.1.1 cpe:2.3:o:huawei:emui:10.1.1:*:*:*:*:*:*:*
huawei emui 12.0.0 cpe:2.3:o:huawei:emui:12.0.0:*:*:*:*:*:*:*
huawei magic_ui 3.1.0 cpe:2.3:o:huawei:magic_ui:3.1.0:*:*:*:*:*:*:*
huawei magic_ui 3.1.1 cpe:2.3:o:huawei:magic_ui:3.1.1:*:*:*:*:*:*:*

References for CVE-2021-40019

cvelogic Threat Intelligence