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CVE Record

CVE-2021-39967: There is a Vulnerability of obtaining broadcast information improperly due to improper broadcast permission...

There is a Vulnerability of obtaining broadcast information improperly due to improper broadcast permission settings in Smartphones.Successful exploitation of this vulnerability may affect service confidentiality.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-39967 is a Huawei smartphone vulnerability where broadcast permission settings may allow improper access to broadcast information. The stated business impact is confidentiality loss. The affected platforms are EMUI, Magic UI, and HarmonyOS versions listed in the CVE bundle.

Executive priority

Treat as high priority for fleets using Huawei smartphones, especially where devices handle sensitive communications or business data. Urgency depends on confirmed affected versions and patch availability from Huawei guidance.

Technical view

The issue is described as improper broadcast permission settings in Huawei smartphones. CVSS 3.1 is 7.5, with network attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high confidentiality impact only.

Likely exposure

Exposure is limited to Huawei devices running affected EMUI 9.1.0-10.1.1, Magic UI 2.1.1-3.1.1, or HarmonyOS 2.0 versions identified in the source bundle.

Exploitation context

The provided sources do not report active exploitation, and the CVE is not marked as CISA KEV. No public exploit status is established by the supplied evidence.

Researcher notes

The bundle provides CVSS, affected Huawei OS versions, and vendor bulletin links, but not CWE, root-cause detail, exploit artifacts, or fixed build identifiers. Keep analysis constrained to confidentiality exposure and vendor bulletin validation.

Mitigation direction

  • Identify Huawei devices running affected EMUI, Magic UI, or HarmonyOS versions.
  • Review Huawei November 2021 security bulletins for vendor-provided update guidance.
  • Apply applicable Huawei firmware or security updates through supported channels.
  • Prioritize unmanaged or sensitive-use devices until patch status is confirmed.
  • Retire or isolate affected devices that cannot receive vendor updates.

Validation and detection

  • Inventory device OS family and version through MDM or device settings.
  • Compare versions against the affected list in the CVE source bundle.
  • Confirm installed security patch level against Huawei bulletin guidance.
  • Verify no affected versions remain in managed device reporting.
  • Document unsupported devices and compensating restrictions.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2021-39967 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2021-39967Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
HuaweiEMUI10.1.1, 10.1.0, 10.0.0, 9.1.1, 9.1.0Listed
HuaweiMagic UI3.1.1, 3.1.0, 3.0.0, 2.1.1Listed
HuaweiHarmonyOS2.0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.