What is CVE-2018-4290?

CVE-2018-4290 is a medium-severity vulnerability in Apple Iphone OS. CVSS score: 5.9/10. Published 2019-04-03.

How severe is CVE-2018-4290?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Apple Iphone OS

CVE-2018-4290

A denial of service issue was addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, watchOS 4.3.2.

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

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Apple Iphone OS
Apple watchOS
iOS, watchOS — versions Versions prior to: iOS 11.4.1, watchOS 4.3.2

References

support.apple.com/kb/HT208938 (Vendor Advisory)
support.apple.com/kb/HT208935 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4290?: CVE-2018-4290 is a medium-severity vulnerability in Apple Iphone OS. CVSS score: 5.9/10. Published 2019-04-03.
How severe is CVE-2018-4290?: Medium severity. CVSS v3 base score is 5.9 out of 10.