What is CVE-2019-8704?

CVE-2019-8704 is a medium-severity vulnerability in Apple Iphone OS, classified under Improper Authentication. CVSS score: 5.5/10. Published 2019-12-18.

How severe is CVE-2019-8704?

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

Auth bypass in Apple Iphone OS

CVE-2019-8704

An authentication issue was addressed with improved state management. This issue is fixed in tvOS 13. A local user may be able to leak sensitive user information.

Vulnerability class: Broken Authentication

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

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.003 (21.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Apple Iphone OS
Apple tvOS — versions unspecified

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

support.apple.com/HT210606 (Vendor Advisory)
support.apple.com/HT210604 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8704?: CVE-2019-8704 is a medium-severity vulnerability in Apple Iphone OS, classified under Improper Authentication. CVSS score: 5.5/10. Published 2019-12-18.
How severe is CVE-2019-8704?: Medium severity. CVSS v3 base score is 5.5 out of 10.