CVE-2018-4436

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-04-03 · updated 2026-06-17
Weakness: CWE-295

Description

A certificate validation issue existed in configuration profiles. This was addressed with additional checks. This issue affected versions prior to iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2.

Affected products

Apple Iphone Os: before 12.1.1 — fixed in 12.1.1
Apple tvOS: before 12.1.1 — fixed in 12.1.1
Apple watchOS: before 5.1.2 — fixed in 5.1.2

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.1.1; Apple tvOS 12.1.1; Apple watchOS 5.1.2. Check the vendor advisory for mitigations.

References

https://support.apple.com/kb/HT209340
https://support.apple.com/kb/HT209342
https://support.apple.com/kb/HT209343
https://support.apple.com/kb/HT209340
https://support.apple.com/kb/HT209342
https://support.apple.com/kb/HT209343

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