What’s Vulnerable › Vulnerabilities

CVE-2018-4478

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-23 · updated 2026-06-17
• Weakness: CWE-269

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.

Affected products

• macOS: before 10.13.5; from 10.11 before 10.11.6; from 10.12 before 10.12.6; 10.11.6, 10.11.6-security_update_2016-001, 10.11.6-security_update_2016-002, 10.11.6-security_update_2016-003, 10.11.6-security_update_2017-001, 10.11.6-security_update_2017-002 (+10) — fixed in 10.11.6, 10.12.6, 10.13.5

How to fix

Upgrade to a fixed version: macOS 10.11.6, 10.12.6, 10.13.5. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT208849
• https://support.apple.com/en-us/HT208849

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