What’s Vulnerable › Vulnerabilities

CVE-2018-4276

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-03 · updated 2026-06-17
• Weakness: CWE-476

Description

A null pointer dereference was addressed with improved validation. This issue affected versions prior to macOS High Sierra 10.13.6.

Affected products

• macOS: before 10.13.6 — fixed in 10.13.6

How to fix

Upgrade to a fixed version: macOS 10.13.6. Check the vendor advisory for mitigations.

References

• https://support.apple.com/kb/HT208937
• https://support.apple.com/kb/HT208937

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