Security readout for executives and security teams
Plain-English summary
CVE-2021-0509 is an Android local privilege escalation issue in CryptoPlugin.cpp. A race condition could cause use-after-free behavior, potentially letting local code gain higher privileges. The source identifies Android 8.1, 9, 10, and 11 as affected. No user interaction is required, but the issue is local, not remotely triggered in the provided evidence.
Executive priority
Treat this as a mobile fleet hygiene priority. It is not evidenced as actively exploited, but local privilege escalation on Android can increase impact after initial compromise or malicious app installation.
Technical view
The vulnerability is a race-condition-driven use-after-free in various CryptoPlugin.cpp functions. The CVE states this could allow local escalation of privilege without additional execution privileges. The provided bundle does not include CVSS, CWE, affected component package details, or exploit mechanics.
Likely exposure
Exposure is most relevant for organizations with Android 8.1, 9, 10, or 11 devices that lack the relevant Android security bulletin updates. OEM patch cadence and device support status likely determine practical exposure.
Exploitation context
The source says exploitation needs no user interaction and no additional execution privileges, but it describes local escalation only. The bundle does not show active exploitation, public exploit availability, or CISA KEV listing.
Researcher notes
Key missing data includes CVSS, CWE mapping, affected subsystem detail beyond CryptoPlugin.cpp, and vendor-specific patch status. Validation should focus on Android security patch levels, OEM bulletins, and whether affected OS versions remain deployed.
Mitigation direction
- Apply Android security updates that include the June 2021 bulletin fixes.
- Prioritize unsupported Android 8.1 through 11 devices for replacement or isolation.
- Check OEM advisories for device-specific patch availability and patch levels.
- Limit high-risk app installation paths on affected Android devices.
Validation and detection
- Inventory Android devices by OS version and security patch level.
- Confirm patch coverage against the June 2021 Android security bulletin.
- Identify Android 8.1, 9, 10, and 11 devices still in production.
- Review MDM posture for unsupported or unpatched 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-2021-0509 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.