Security readout for executives and security teams
Plain-English summary
CVE-2021-0543 is an Android 11 flaw in NFC-related handling that could write outside memory bounds. Public sources say it could lead to local privilege escalation, needs no user interaction, and requires System execution privileges. No CVSS score or severity is provided in the bundle.
Executive priority
Treat this as a targeted mobile platform hygiene issue, not a confirmed emergency. Prioritize identifying Android 11 devices, confirming patch level, and reducing unsupported device exposure.
Technical view
The issue is in phNxpNciHal_process_ext_rsp in phNxpNciHal_ext.cc. An integer overflow may cause an out-of-bounds write. The affected product listed is Android 11. The record does not provide CWE, CVSS, exploit details, or a standalone mitigation.
Likely exposure
Exposure is limited to Android 11 devices that include the affected component and have not received the relevant vendor security update. The bundle specifically references Android and a Pixel security bulletin, but does not prove exposure for every OEM build.
Exploitation context
The sources do not report active exploitation, and CISA KEV status is false. The described attack context is local privilege escalation with no user interaction, but exploit prerequisites beyond System execution privileges are not explained.
Researcher notes
Evidence is sparse. The record identifies function, file, bug class, product, and Android ID A-169258743, but does not include CVSS, CWE, exploit chain, commit, or affected OEM matrix. Avoid broad claims beyond Android 11 and the referenced bulletin.
Mitigation direction
- Check the Android and Pixel June 2021 security bulletin for vendor update guidance.
- Patch Android 11 devices through OEM-supported security updates.
- Prioritize managed devices that are still on Android 11.
- Retire or isolate devices that cannot receive vendor security updates.
Validation and detection
- Inventory Android 11 devices and their OEM security patch levels.
- Confirm whether device builds include the affected NFC HAL component.
- Verify patch status against the referenced Android or Pixel bulletin.
- Review mobile device management records for unpatched Android 11 endpoints.
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-2021-0543 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.