Security readout for executives and security teams
Plain-English summary
CVE-2021-0535 is an Android 11 memory-corruption flaw in a Wi-Fi control interface component. The public record says it could allow local privilege escalation without user interaction, but it does not provide CVSS, exploit details, or broad exploitation evidence.
Executive priority
Treat this as a patch-compliance issue for legacy Android 11 devices. It does not justify emergency response based on the supplied sources, but unmanaged or unpatched mobile fleets should be reviewed promptly.
Technical view
The issue is a possible use-after-free in wpas_ctrl_msg_queue_timeout in ctrl_iface_unix.c. The CVE description ties impact to local escalation of privilege and mentions System execution privileges. Available sources identify Android 11 as affected and reference the Pixel June 2021 security bulletin.
Likely exposure
Exposure is most likely on Android 11 devices that did not receive the relevant 2021 Android or Pixel security update. The source bundle does not identify other Android versions, downstream vendor builds, or device-specific patch levels.
Exploitation context
The source bundle reports local privilege escalation with no user interaction, but it is not in CISA KEV and no cited source states active exploitation. Public evidence here is insufficient to claim weaponization or exploitation in the wild.
Researcher notes
Key gaps are CVSS, CWE mapping, exact fixed build levels, and exploitability prerequisites. The phrase about System execution privileges is ambiguous in the source, so avoid assuming a no-privilege local exploit without vendor confirmation.
Mitigation direction
- Check Android or device-vendor security bulletin guidance for CVE-2021-0535.
- Prioritize patch verification on Android 11 and Pixel fleets.
- Retire or isolate devices that cannot receive vendor security updates.
- Use mobile device management to enforce minimum Android security patch levels.
Validation and detection
- Inventory Android devices and identify Android 11 systems.
- Confirm each device's Android security patch level includes the relevant June 2021 fix.
- Review vendor advisories for model-specific patch availability.
- Check MDM compliance reports for unsupported or stale Android patch levels.
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-2021-0535 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/pixel/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.