What is CVE-2018-4435?

CVE-2018-4435 is a high-severity vulnerability in Apple Iphone OS, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2019-04-03.

How severe is CVE-2018-4435?

High severity. CVSS v3 base score is 7.8 out of 10.

Improper input validation in Apple Iphone OS

CVE-2018-4435

A logic issue was addressed with improved restrictions. This issue affected versions prior to iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2019-04-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.3th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Apple Iphone OS
Apple Mac OS X
Apple tvOS
Apple watchOS
iOS, macOS, tvOS, watchOS — versions Versions prior to: iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/kb/HT209343 (Vendor Advisory)
support.apple.com/kb/HT209342 (Vendor Advisory)
support.apple.com/kb/HT209340 (Vendor Advisory)
support.apple.com/kb/HT209341 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4435?: CVE-2018-4435 is a high-severity vulnerability in Apple Iphone OS, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2019-04-03.
How severe is CVE-2018-4435?: High severity. CVSS v3 base score is 7.8 out of 10.