Security readout for executives and security teams
Plain-English summary
CVE-2018-4406 is an Apple macOS denial-of-service vulnerability. The public record says it was fixed through improved validation and affected versions before macOS Mojave 10.14. The source bundle does not provide CVSS, CWE, technical component details, or evidence of active exploitation.
Executive priority
Prioritize based on legacy macOS presence. If the fleet is fully on Mojave 10.14 or later supported releases, urgency is low. If older Macs remain connected, remediate or isolate them because denial-of-service issues can disrupt availability.
Technical view
The available sources describe a denial-of-service issue in macOS versions prior to Mojave 10.14. Apple addressed it with improved validation. No vulnerable subsystem, attack prerequisites, proof-of-concept status, or exploit mechanics are provided in the supplied record, so technical exposure assessment must rely on macOS version inventory and Apple guidance.
Likely exposure
Exposure is most likely limited to legacy Macs running macOS versions earlier than Mojave 10.14. Organizations with old endpoints, unmanaged Macs, lab systems, or retired-but-connected devices should check inventory.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, public exploit availability, or attacker targeting. Treat this as a potential availability risk unless additional vendor or threat-intelligence evidence emerges.
Researcher notes
Public evidence is sparse: no CVSS, CWE, component name, or exploitation details are included in the supplied record. Avoid assuming remote reachability or exploitability beyond the denial-of-service description. Version-based validation is the strongest supported assessment path.
Mitigation direction
- Inventory all macOS endpoints and identify versions earlier than Mojave 10.14.
- Follow Apple advisory guidance for HT209139 and HT209193.
- Upgrade affected Macs to macOS Mojave 10.14 or a supported later release.
- Retire, isolate, or tightly manage systems that cannot be upgraded.
- Monitor Apple security guidance for any additional remediation notes.
Validation and detection
- Confirm managed Mac OS versions through endpoint inventory tooling.
- Verify affected systems are no longer running pre-Mojave macOS versions.
- Check vulnerability scanner results against CVE-2018-4406 after remediation.
- Review exception lists for legacy Macs that remain connected.
- Document compensating controls for any device that cannot be updated.
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-2018-4406 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/kb/HT209193CVE reference · x_refsource_MISC
- https://support.apple.com/kb/HT209139CVE 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.