What is CVE-2019-8668?

CVE-2019-8668 is a medium-severity vulnerability in Apple iOS, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2020-10-27.

How severe is CVE-2019-8668?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Improper input validation in Apple iOS

CVE-2019-8668

A denial of service issue was addressed with improved validation. This issue is fixed in iOS 12.4, tvOS 12.4, watchOS 5.3. Processing a maliciously crafted image may lead to a denial of service.

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

Published 2020-10-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Apple iOS — versions unspecified
Apple Iphone OS
Apple tvOS — versions unspecified
Apple watchOS — versions unspecified

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/en-us/HT210353 (Vendor Advisory)
support.apple.com/en-us/HT210346 (Vendor Advisory)
support.apple.com/en-us/HT210351 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8668?: CVE-2019-8668 is a medium-severity vulnerability in Apple iOS, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2020-10-27.
How severe is CVE-2019-8668?: Medium severity. CVSS v3 base score is 5.5 out of 10.