CVE-2018-4423

HIGHNVD 7.87.8—

7.8

A logic issue was addressed with improved validation. This issue affected versions prior to macOS Mojave 10.14.1.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 44.3%
KEV: Not listed

Published

April 3, 2019

Last Modified

November 21, 2024

References (2)

product-security@applehttps://support.apple.com/kb/HT209193
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT209193

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-20Improper Input Validation

Data Freshness Timeline

(refreshed 9× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:43 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 21:01 UTCEG score recompute
2026-05-27 21:01 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2018-4423?

CVE-2018-4423 is a high vulnerability published on April 3, 2019. A logic issue was addressed with improved validation. This issue affected versions prior to macOS Mojave 10.14.1.

When was CVE-2018-4423 disclosed?

CVE-2018-4423 was first published in the National Vulnerability Database on April 3, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-4423 actively exploited?

CVE-2018-4423 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-4423?

CVE-2018-4423 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2018-4423?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-4423, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-4423

Explore →

Is Your Infrastructure Affected by CVE-2018-4423?

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Start Free Scan →Browse All CVEs

Frequently asked(5)

What is CVE-2018-4423?

CVE-2018-4423 is a high vulnerability published on April 3, 2019. A logic issue was addressed with improved validation. This issue affected versions prior to macOS Mojave 10.14.1.

When was CVE-2018-4423 disclosed?

Is CVE-2018-4423 actively exploited?

What is the CVSS score of CVE-2018-4423?

CVE-2018-4423 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2018-4423?

CVE-2018-4423

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-4423?

CVE-2018-4423

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-4423?

🔗 Related CVEs(same CWE)

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Published

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References (2)

Frequently asked(5)

Published

Last Modified

References (2)

Frequently asked(5)

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