CVE-2018-4478

Name: CVE-2018-4478
Creator: NVD / NIST
Published: 2021-12-23T20:15:08.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2018-4478 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. A validation issue was addressed with improved logic. This issue is fixed in macOS High Sierra 10.13.5, Security Update 2018-003 Sierra, Security Update 2018-003 El Capitan. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

A validation issue was addressed with improved logic. This issue is fixed in macOS High Sierra 10.13.5, Security Update 2018-003 Sierra, Security Update 2018-003 El Capitan. An attacker with physical access to a device may be able to elevate privileges.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.27%

19.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.13.5
Apple	Mac Os X	>= 10.11, < 10.11.6
Apple	Mac Os X	>= 10.12, < 10.12.6
Apple	Mac Os X	10.11.6
Apple	Mac Os X	10.12.6

References

https://support.apple.com/en-us/HT208849Vendor Advisory
https://support.apple.com/en-us/HT208849Vendor Advisory

Timeline

Published: Dec 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-4478?

How severe is CVE-2018-4478?

CVE-2018-4478 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2018-4478?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4478?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST