Security readout for executives and security teams
Plain-English summary
CVE-2018-4166 is an Apple platform vulnerability where a maliciously crafted app could trigger a race condition and run code with higher privileges. The main business risk is legacy Apple devices that missed 2018 security updates. No CISA KEV listing is provided in the source bundle.
Executive priority
Treat this as a legacy exposure cleanup item with high impact if vulnerable devices remain. Prioritize executive attention if older Apple endpoints are still used for business access or sensitive workflows.
Technical view
The issue is a race condition in Apple NSURLSession. The CVE states iOS before 11.3, macOS before 10.13.4, tvOS before 11.3, and watchOS before 4.3 are affected. Successful abuse requires a crafted app and may result in arbitrary code execution in a privileged context.
Likely exposure
Exposure is most likely on unmanaged, legacy, or unsupported Apple devices still running versions older than iOS 11.3, macOS 10.13.4, tvOS 11.3, or watchOS 4.3.
Exploitation context
The source bundle describes exploitation through a crafted app. It does not provide evidence of active exploitation, public weaponization, or inclusion in CISA KEV.
Researcher notes
Evidence is limited to CVE metadata and Apple advisory references. No CVSS, CWE, exploit details, or vendor mitigation beyond fixed-version boundaries are included in the provided bundle.
Mitigation direction
- Upgrade affected Apple devices to the fixed versions or later.
- Use Apple advisories to confirm platform-specific update guidance.
- Remove or isolate devices that cannot receive security updates.
- Limit installation of untrusted apps while remediation is pending.
Validation and detection
- Inventory Apple OS versions across managed and unmanaged devices.
- Flag iOS below 11.3 and macOS below 10.13.4.
- Flag tvOS below 11.3 and watchOS below 4.3.
- Confirm fixed versions through MDM or device security reporting.
- Review unsupported devices for retirement or isolation.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-4166 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://support.apple.com/HT208692CVE reference · x_refsource_CONFIRM
- https://support.apple.com/HT208698CVE reference · x_refsource_CONFIRM
- https://support.apple.com/HT208696CVE reference · x_refsource_CONFIRM
- https://support.apple.com/HT208693CVE reference · x_refsource_CONFIRM
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.