High severity7.5NVD Advisory· Published Jun 8, 2018· Updated Jun 17, 2026

CVE-2018-4221

Description

An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the "Security" component. It allows web sites to track users by leveraging the transmission of S/MIME client certificates.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Apple Inc./iOSllm-fuzzy
Range: <11.4
Apple Inc./macOSllm-fuzzy
Range: <10.13.5
Apple Inc./Iphone OS
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Range: <11.4
Apple Inc./Mac OS X
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
Range: <10.13.5

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/104897nvdThird Party AdvisoryVDB Entry
www.securitytracker.com/id/1041027nvdThird Party AdvisoryVDB Entry
support.apple.com/HT208848nvdVendor Advisory
support.apple.com/HT208849nvdVendor Advisory

News mentions

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