What is CVE-2018-4446?

CVE-2018-4446 is a low-severity vulnerability in Apple Iphone OS, classified under Improper Input Validation. CVSS score: 3.3/10. Published 2019-04-03.

How severe is CVE-2018-4446?

Low severity. CVSS v3 base score is 3.3 out of 10.

Improper input validation in Apple Iphone OS

CVE-2018-4446

This issue was addressed with improved entitlements. This issue affected versions prior to iOS 12.1.1.

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

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

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Apple Iphone OS
iOS — versions Versions prior to: iOS 12.1.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/kb/HT209340 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4446?: CVE-2018-4446 is a low-severity vulnerability in Apple Iphone OS, classified under Improper Input Validation. CVSS score: 3.3/10. Published 2019-04-03.
How severe is CVE-2018-4446?: Low severity. CVSS v3 base score is 3.3 out of 10.