What is CVE-2019-8665?

CVE-2019-8665 is a high-severity vulnerability in Apple iOS, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2019-12-18.

How severe is CVE-2019-8665?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Apple iOS

CVE-2019-8665

A denial of service issue was addressed with improved validation. This issue is fixed in iOS 12.4, watchOS 5.3. A remote attacker may cause an unexpected application termination.

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

Published 2019-12-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/HT210353 (Vendor Advisory)
support.apple.com/HT210346 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8665?: CVE-2019-8665 is a high-severity vulnerability in Apple iOS, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2019-12-18.
How severe is CVE-2019-8665?: High severity. CVSS v3 base score is 7.5 out of 10.