Security readout for executives and security teams
Plain-English summary
CVE-2021-39738 is an Android Automotive issue where a Bluetooth device could be paired without the user's consent because CarSettings missed a permission check. The stated impact is local privilege escalation. The source bundle does not provide CVSS, severity, or confirmed exploitation evidence.
Executive priority
Treat this as a targeted fleet hygiene issue unless exposed assets are safety-critical or broadly unmanaged. Prioritize OEM patch confirmation for Android Automotive environments, but do not claim emergency exploitation without stronger evidence.
Technical view
The vulnerability is in Android CarSettings and affects Android 10, 11, 12, and 12L. The CVE description says exploitation needs no additional execution privileges and no user interaction, but it is a local escalation path tied to Bluetooth pairing consent bypass.
Likely exposure
Exposure is most relevant to vehicles or systems running affected Android Automotive or Android builds with CarSettings and Bluetooth pairing capability. The bundle does not identify specific OEMs, device models, or fixed build numbers.
Exploitation context
The source states local escalation of privilege and no user interaction. There is no KEV listing and no cited evidence of active exploitation in the provided bundle.
Researcher notes
Key unknowns are severity score, affected OEM implementations, fixed build identifiers, and exploitability details. The available description supports permission-check failure in CarSettings, Bluetooth pairing consent bypass, and local privilege escalation only.
Mitigation direction
- Review Android Automotive OS May 2022 vendor guidance for this CVE.
- Apply OEM or platform security updates that address CVE-2021-39738.
- Inventory affected Android 10, 11, 12, and 12L systems.
- Ask OEMs for fixed build or patch-level confirmation.
- Monitor for unexpected Bluetooth pairings on managed systems.
Validation and detection
- Confirm whether assets run affected Android or Android Automotive versions.
- Check vendor bulletin mapping for CVE-2021-39738 remediation status.
- Verify installed security patch level against OEM guidance.
- Review Bluetooth paired-device lists for unauthorized entries.
- Document systems without available vendor fixes for risk 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-2021-39738 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/aaos/2022-05-01CVE 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.