Security readout for executives and security teams
Plain-English summary
CVE-2021-40016 is a Huawei mobile OS Bluetooth permission-control issue. If exploited, it could expose confidential information. The public bundle does not provide CVSS scoring, attack prerequisites, fixed builds, or evidence of active exploitation.
Executive priority
Treat this as a targeted mobile fleet hygiene item, not an emergency based on current evidence. Prioritize if Huawei devices are common in executive, field, or regulated-data environments.
Technical view
The CVE describes improper permission control in the Bluetooth module affecting Huawei EMUI 10.1.0, 10.1.1, 11.0.0, 12.0.0 and Magic UI 3.1.0, 3.1.1, 4.0.0. The stated impact is confidentiality loss.
Likely exposure
Exposure is likely limited to Huawei devices running the affected EMUI or Magic UI versions. Organizations with managed mobile fleets, BYOD Huawei devices, or Bluetooth-enabled workflows should inventory those endpoints.
Exploitation context
The source bundle does not cite public exploitation, exploit code, or CISA KEV listing. It also does not describe whether exploitation requires proximity, pairing, user interaction, or local privileges.
Researcher notes
Public data is sparse: no CVSS vector, CWE, attack vector, or fixed-version detail appears in the provided bundle. Analysis should stay anchored to Huawei’s bulletin and verified device build applicability.
Mitigation direction
- Identify Huawei devices running affected EMUI or Magic UI versions.
- Review Huawei’s July 2022 bulletin for vendor update guidance.
- Apply Huawei-provided security updates when available for each device model.
- Retire or restrict unsupported affected devices until vendor guidance is confirmed.
- Limit unnecessary Bluetooth use on exposed devices as a temporary risk reduction.
Validation and detection
- Inventory managed and BYOD Huawei devices by OS and Magic UI or EMUI version.
- Compare device versions against the affected versions in the CVE record.
- Check Huawei’s bulletin for fixed builds applicable to each model.
- Confirm updated devices no longer match listed affected versions or vendor-fixed criteria.
- Document any unsupported devices and compensating controls.
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-2021-40016 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://consumer.huawei.com/en/support/bulletin/2022/7/CVE 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.