Security readout for executives and security teams
Plain-English summary
CVE-2021-0542 is an Android 11 privacy flaw that could expose paired Bluetooth addresses on a local device. It requires user interaction and does not require additional execution privileges. The sources do not provide CVSS scoring or evidence of active exploitation.
Executive priority
Treat this as a privacy and asset-hygiene issue, not a crisis. Prioritize remediation for managed Android 11 fleets, sensitive mobile users, and unsupported devices lacking vendor security updates.
Technical view
Android reports a missing permission check in updateNotification of BeamTransferManager.java. The stated impact is local information disclosure of paired Bluetooth addresses on Android 11. Available public data does not include a CWE, CVSS vector, detailed attack path, or independent exploit confirmation.
Likely exposure
Exposure is most likely limited to Android 11 devices, especially Pixel or OEM builds that had not received the relevant June 2021 Android security updates or later vendor fixes.
Exploitation context
The provided sources say exploitation requires user interaction and local context. CVE data does not indicate additional execution privileges are needed. It is not listed as KEV, and no cited source reports active exploitation.
Researcher notes
Evidence is limited to the CVE description and Android Pixel bulletin reference. Do not assume remote exploitability, broader Android versions, or public exploit availability. Validation should focus on patch level and vendor bulletin mapping.
Mitigation direction
- Identify Android 11 devices in managed or supported fleets.
- Apply the relevant Android or Pixel June 2021 security update, or later OEM guidance.
- Confirm OEMs shipped the fix for non-Pixel Android 11 devices.
- Reduce exposure from unsupported Android 11 devices through upgrade or replacement planning.
Validation and detection
- Check device Android version and security patch level.
- Verify Pixel devices include the June 2021 security bulletin level or later.
- Review OEM advisories for equivalent Android 11 fixes.
- Confirm mobile device management inventory reflects remediated patch levels.
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-2021-0542 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://source.android.com/security/bulletin/pixel/2021-06-01CVE 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.