A validation issue was addressed with improved logic.

published 2021-12-23 4y ago modified 2026-06-17 4mo ago also EUVD-2018-16264

cvss: 6.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Apple macOS 10.13

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Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.8	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

Apple macOS

Classification

Weakness

CWE-269 Improper Privilege Management

References

support.apple.com /en-us/HT208849
vendor-advisory

Sources

CVE List CVE-2018-4478
NVD CVE-2018-4478

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