What is CVE-2019-8617?

CVE-2019-8617 is a critical-severity vulnerability in Apple iOS. CVSS score: 9.6/10. Published 2019-12-18.

How severe is CVE-2019-8617?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Apple iOS

CVE-2019-8617

An access issue was addressed with additional sandbox restrictions. This issue is fixed in iOS 12.3. A sandboxed process may be able to circumvent sandbox restrictions.

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

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Apple iOS — versions unspecified
Apple Iphone OS

References

support.apple.com/HT210118 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8617?: CVE-2019-8617 is a critical-severity vulnerability in Apple iOS. CVSS score: 9.6/10. Published 2019-12-18.
How severe is CVE-2019-8617?: Critical severity. CVSS v3 base score is 9.6 out of 10.