What is CVE-2018-4296?

CVE-2018-4296 is a critical-severity vulnerability in Apple macOS. CVSS score: 9.8/10. Published 2020-10-27.

How severe is CVE-2018-4296?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Apple macOS

CVE-2018-4296

This issue is fixed in macOS Mojave 10.14. A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks.

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X — versions 10.14

References

support.apple.com/en-us/HT209139 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4296?: CVE-2018-4296 is a critical-severity vulnerability in Apple macOS. CVSS score: 9.8/10. Published 2020-10-27.
How severe is CVE-2018-4296?: Critical severity. CVSS v3 base score is 9.8 out of 10.