Security readout for executives and security teams
Plain-English summary
CVE-2021-0487 is an Android 11 issue where calendar data could be exported to shared storage without clear user consent. The source describes a tapjacking or overlay condition and potential local privilege escalation. Public evidence provided does not show active exploitation.
Executive priority
Treat this as a targeted mobile data exposure and local privilege risk, not a confirmed mass-exploitation event. Patch validation is the main priority, especially for Android 11 devices handling business calendars.
Technical view
The vulnerability is in CalendarDebugActivity.java on Android 11. A tapjacking or overlay attack could cause calendar data export to sdcard without consent, with user execution privileges. No CVSS, CWE, or detailed patch mechanics are provided in the bundle.
Likely exposure
Exposure appears limited to Android 11 devices containing the affected Calendar component and lacking the relevant Android May 2021 security fixes. Organizations with unmanaged or rarely updated Android fleets should verify patch levels.
Exploitation context
The CVE record says exploitation does not require user interaction, but also describes a tapjacking or overlay attack. That inconsistency is not resolved in the provided sources. CISA KEV status is false, so active exploitation is not evidenced here.
Researcher notes
The available record is sparse: no CVSS vector, CWE, proof-of-concept detail, or exploit telemetry is provided. Analysis should stay anchored to Android 11 CalendarDebugActivity behavior and the May 2021 Android security bulletin.
Mitigation direction
- Apply OEM Android updates that include CVE-2021-0487 or the May 2021 Android bulletin fixes.
- Prioritize Android 11 devices used for sensitive calendar or business scheduling data.
- Check vendor advisories for device-specific patch availability and deployment constraints.
- Retire or restrict Android 11 devices that cannot receive relevant security updates.
Validation and detection
- Inventory Android 11 devices across managed and unmanaged fleets.
- Check each device Android security patch level and OEM advisory coverage.
- Confirm vendor patch notes reference CVE-2021-0487 or the May 2021 bulletin.
- Review MDM compliance reports for devices below the required patch level.
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-2021-0487 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/2021-05-01CVE 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.