Security readout for executives and security teams
Plain-English summary
CVE-2021-0504 is an Android 11 Bluetooth vulnerability that could let a nearby attacker cause an out-of-bounds read and disclose information. The source says exploitation needs no user interaction and no extra privileges, but it does not provide a CVSS score or evidence of active exploitation.
Executive priority
Treat this as a moderate mobile exposure issue. The risk is constrained to Android 11 in the supplied evidence, but no-click Bluetooth information disclosure justifies confirming patch coverage, especially for executives, field staff, and sensitive mobile workflows.
Technical view
The flaw is in Android's AVRCP browsing response parser, avrc_pars_browse_rsp in avrc_pars_ct.cc. A missing bounds check may allow an out-of-bounds read, leading to remote information disclosure over Bluetooth. The provided affected scope is Android 11 only.
Likely exposure
Exposure is most likely on Android 11 devices that have not received the Android June 2021 security bulletin fixes or corresponding OEM updates. Bluetooth reachability matters; the bundle does not identify specific device models, chipsets, or non-Android products.
Exploitation context
The CVE record states remote information disclosure over Bluetooth with no privileges and no user interaction. It does not state public exploit availability, exploitation in the wild, or inclusion in CISA KEV; KEV is false in the supplied bundle.
Researcher notes
Evidence is limited to the CVE description and Android bulletin reference. No CVSS vector, CWE, proof of concept, affected model list, or commit details are included in the bundle. Avoid expanding affected scope beyond Android 11 without additional vendor evidence.
Mitigation direction
- Inventory Android 11 devices and record current Android security patch levels.
- Check the Android June 2021 bulletin and OEM guidance for applicable fixes.
- Apply vendor-provided Android security updates where available.
- Limit Bluetooth exposure on unpatched devices according to operational needs.
- Track OEM advisories because device update availability may vary.
Validation and detection
- Confirm whether managed devices run Android 11.
- Compare each device security patch level with vendor guidance for June 2021 fixes.
- Review mobile device management reports for unpatched Android 11 assets.
- Verify Bluetooth usage policy for devices that cannot be updated promptly.
- Document exceptions and compensating controls for unsupported devices.
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-2021-0504 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/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.