Security readout for executives and security teams
Plain-English summary
This issue could let an attacker expose confidential data through a design flaw in My HUAWEI. The sources do not describe what data is exposed or how, so business impact depends on device population and data handled by affected phones. Treat it as a high-priority mobile confidentiality issue for impacted Huawei fleets.
Executive priority
Prioritize for organizations with meaningful Huawei phone exposure, especially where devices handle confidential business data. Urgency is high for affected fleets, but public evidence in the provided sources does not show active exploitation.
Technical view
CVE-2021-40030 is a design defect in the My HUAWEI app affecting HarmonyOS 2.0, EMUI 12.0.0/11.0.0/10.1.1/10.1.0, and Magic UI 4.0.0/3.1.1/3.1.0. CVSS 3.1 is 7.5, with network attack vector, low complexity, no privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is limited to the listed Huawei mobile platforms and versions. Organizations using managed or BYOD Huawei devices should prioritize inventory checks for HarmonyOS 2.0, EMUI 10.1.0 through 12.0.0, and Magic UI 3.1.0 through 4.0.0.
Exploitation context
The provided sources do not report active exploitation, and this CVE is not marked in KEV. They also do not provide exploit mechanics. The CVSS vector indicates the issue may be remotely reachable without privileges or user interaction, but only confidentiality impact is stated.
Researcher notes
Public detail is sparse: the record describes a My HUAWEI design defect and confidentiality impact, but not the vulnerable component behavior, fixed versions, or exploitation method. Use vendor bulletins and device telemetry to confirm exposure rather than assuming broader Huawei product impact.
Mitigation direction
- Check Huawei’s August 2022 security bulletins for vendor-provided remediation guidance.
- Update affected Huawei device software and My HUAWEI app through approved vendor channels.
- Inventory corporate and BYOD Huawei devices for the listed affected platform versions.
- Reduce sensitive data exposure on affected devices until vendor guidance is applied.
Validation and detection
- Confirm whether any fleet devices run the affected HarmonyOS, EMUI, or Magic UI versions.
- Verify installed Huawei updates against the referenced August 2022 Huawei bulletins.
- Check mobile device management records for My HUAWEI app presence and update status.
- Document remaining affected devices and compensating controls for vulnerability management tracking.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-40030 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://consumer.huawei.com/en/support/bulletin/2022/8/CVE reference · x_refsource_MISC
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202208-0000001363876177CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.