Security readout for executives and security teams
Plain-English summary
This Android flaw could let a local app or user learn package permission information that should be separated between Android users. It is an information disclosure issue, not a remote takeover. The public record lists Android 8.1, 9, 10, and 11 and ties the fix guidance to Android's June 2021 security bulletin.
Executive priority
Address through normal mobile patch governance, with priority for shared or managed Android fleets. There is no cited evidence of active exploitation, but the issue weakens user isolation and may expose sensitive permission information on unpatched devices.
Technical view
CVE-2021-0521 is a missing permission check in getAllPackages within PackageManagerService. The stated impact is local information disclosure of cross-user permissions, with no additional execution privileges and no user interaction required. The sources do not provide CVSS, CWE, proof-of-concept details, or broader exploit telemetry.
Likely exposure
Exposure is most relevant for organizations managing Android 8.1, 9, 10, or 11 devices that have not received the June 2021 Android security updates or equivalent OEM backports. Multi-user, shared, kiosk, or enterprise-managed devices may have higher confidentiality concern.
Exploitation context
The CVE record describes local exploitation without user interaction, but it does not state active exploitation. CISA KEV status in the provided bundle is false. Treat this as a confidentiality defect requiring patch validation, not as confirmed in-the-wild compromise.
Researcher notes
The public detail is limited to Android ID A-174661955 and the affected PackageManagerService method. No exploit path, CVSS vector, or CWE is provided in the source bundle. Validation should focus on patch lineage and OEM bulletin mapping rather than exploit reproduction.
Mitigation direction
- Apply Android vendor updates that include the June 2021 security bulletin fixes.
- Prioritize affected shared, kiosk, and enterprise-managed Android devices.
- Check OEM guidance for backported fixes on customized Android builds.
- Retire or isolate devices that cannot receive supported security updates.
Validation and detection
- Inventory Android devices running versions 8.1, 9, 10, or 11.
- Verify each device has an OEM build including the June 2021 Android fixes.
- Review mobile device management records for unsupported or stale patch levels.
- Confirm shared-user Android deployments are patched or removed from sensitive workflows.
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-2021-0521 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.