Security readout for executives and security teams
Plain-English summary
CVE-2021-0507 is an Android Bluetooth flaw that could let a nearby attacker run code on affected devices without user interaction. The issue is serious for fleets still running Android 8.1, 9, 10, or 11 without the relevant Android security update.
Executive priority
Treat this as high priority for legacy or slow-patched Android fleets. The business risk is strongest where devices handle sensitive data, remain Bluetooth-enabled, or cannot be centrally patched. No source-provided evidence confirms active exploitation.
Technical view
The flaw is an out-of-bounds write in Android's Bluetooth AVRCP handling, specifically handle_rc_metamsg_cmd in btif_rc.cc, caused by a missing bounds check. Public source text states this could lead to remote code execution over Bluetooth with no additional privileges and no user interaction.
Likely exposure
Exposure is most likely on Android devices running Android 8.1, 9, 10, or 11 that have not received the June 2021 Android security fixes or equivalent vendor updates. Bluetooth proximity is required based on the described attack surface.
Exploitation context
The provided sources do not show KEV listing or active exploitation evidence. The reported impact is remote code execution over Bluetooth, but no public exploit status, exploit reliability, or affected hardware-specific behavior is provided in the source bundle.
Researcher notes
Focus validation on Android Bluetooth stack patch status rather than exploit testing. The source bundle identifies the vulnerable function and bug class, but does not provide CVSS, CWE, exploit indicators, or device-specific patch variance. Vendor bulletin mapping is needed for exact build verification.
Mitigation direction
- Check Android June 2021 security bulletin and device vendor guidance for fixed builds.
- Apply available Android security updates for affected Android 8.1, 9, 10, and 11 devices.
- Retire or isolate devices that cannot receive vendor security updates.
- Limit Bluetooth use on unpatched devices where business operations allow.
- Prioritize mobile fleet management enforcement for minimum Android security patch levels.
Validation and detection
- Inventory Android devices running versions 8.1, 9, 10, and 11.
- Verify each device's Android security patch level against vendor guidance.
- Identify unpatched devices with Bluetooth enabled or operationally required.
- Check mobile vulnerability management tools for CVE-2021-0507 coverage.
- Document exceptions for 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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-0507 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.