How severe is CVE-2018-4451?

CVE-2018-4451 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-4451 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-4451?

CVE-2018-4451 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-4451?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-4451 published?

CVE-2018-4451 was published on 2020-10-27 and last updated on 2026-06-17.

CVE-2018-4451

CVE-2018-4451 is a high-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Mac Os X
Published: 2020-10-27
Last modified: 2026-06-17

Description

This issue is fixed in macOS Mojave 10.14. A memory corruption issue was addressed with improved input validation.

Frequently asked questions

What is CVE-2018-4451?: This issue is fixed in macOS Mojave 10.14. A memory corruption issue was addressed with improved input validation.
How severe is CVE-2018-4451?: CVE-2018-4451 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-4451 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-4451?: CVE-2018-4451 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-4451?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-4451 published?: CVE-2018-4451 was published on 2020-10-27 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/HT209139

Affected products (1)

cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

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