Security readout for executives and security teams
Plain-English summary
CVE-2021-47803 is a local privilege escalation issue in iFunbox 4.2 on Windows. A user already on the machine could abuse an incorrectly quoted service path to run code with LocalSystem privileges after the affected service restarts. This is most urgent where iFunbox is installed on shared workstations, developer machines, or endpoints with sensitive data.
Executive priority
Treat as high priority for affected endpoints, especially shared or sensitive systems. This is not a remote compromise by itself, but it can turn a low-privileged local foothold into full system control. Prioritize inventory and removal or remediation of iFunbox 4.2.
Technical view
The issue is CWE-428: an unquoted service path in the Apple Mobile Device Service associated with iFunbox 4.2. The CVSS 4.0 score is 8.5 with local attack vector, low complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact. Public exploit information is referenced, but the bundle does not show confirmed active exploitation.
Likely exposure
Exposure appears limited to Windows systems running iFunbox 4.2 with the affected Apple Mobile Device Service installed. Risk is higher when standard users can write to directories in the service path or when untrusted users have local access.
Exploitation context
An attacker needs local, low-privileged access. Successful abuse depends on the unquoted service path and service restart behavior. ExploitDB is cited as a public exploit reference, but CISA KEV is false and no supplied source confirms exploitation in the wild.
Researcher notes
The source bundle identifies iFunbox 4.2 as affected and describes LocalSystem code execution through an unquoted service path. No patch version is provided in the supplied sources. Avoid assuming broader Apple software impact without confirming installation context and vendor guidance.
Mitigation direction
- Inventory endpoints for iFunbox 4.2 installations.
- Remove iFunbox where it is not business-required.
- Check vendor and advisory sources for fixed versions or guidance.
- Correct unquoted service path configurations where approved by change control.
- Restrict write permissions along service executable paths.
- Prioritize shared systems and high-value workstations.
Validation and detection
- Confirm whether iFunbox 4.2 is installed on Windows endpoints.
- Review the Apple Mobile Device Service executable path quoting.
- Check whether the service runs with LocalSystem privileges.
- Verify users cannot write to directories in the service path.
- Search EDR logs for suspicious executable placement near service paths.
- Document remediation status per endpoint.
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.
CWE-428: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47803 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
- High
- CVSS
- 8.5 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.5HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50040CVE reference · exploit
- iFunbox Official HomepageCVE reference · product
- VulnCheck Advisory: iFunbox 4.2 - 'Apple Mobile Device Service' Unquoted Service PathCVE reference · third-party-advisory
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.