CVE-2023-40406

MEDIUMNVD 5.55.5—

5.5

The issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.7, macOS Ventura 13.6, macOS Sonoma 14. An app may be able to read arbitrary files.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 19.0%
KEV: Not listed

Published

September 27, 2023

Last Modified

November 4, 2025

References (15)

product-security@applehttp://seclists.org/fulldisclosure/2023/Oct/3
product-security@applehttp://seclists.org/fulldisclosure/2023/Oct/5
product-security@applehttp://seclists.org/fulldisclosure/2023/Oct/6
product-security@applehttps://support.apple.com/en-us/HT213931
product-security@applehttps://support.apple.com/en-us/HT213932
product-security@applehttps://support.apple.com/en-us/HT213940
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Oct/3
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Oct/5
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Oct/6
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213931
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213932
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213940
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213931
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213932
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213940

Data Freshness Timeline

(refreshed 13× in last 7d / 59× 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.

2026-06-23 21:31 UTCEPSS rescore
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2026-06-10 13:21 UTCEPSS rescore
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2026-05-26 07:18 UTCEPSS rescore
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2026-05-26 07:18 UTCEPSS rescore
2026-05-24 17:06 UTCEG score recompute
2026-05-24 17:06 UTCGHSA enrichment
2026-05-23 14:11 UTCOSV refresh

Frequently asked(5)

What is CVE-2023-40406?

CVE-2023-40406 is a medium vulnerability published on September 27, 2023. The issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.7, macOS Ventura 13.6, macOS Sonoma 14. An app may be able to read arbitrary files.

When was CVE-2023-40406 disclosed?

CVE-2023-40406 was first published in the National Vulnerability Database on September 27, 2023, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-40406 actively exploited?

CVE-2023-40406 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-40406?

CVE-2023-40406 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2023-40406?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40406, 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.

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CVE-2023-40406

📅 Published

🔄 Last Modified

🔗 References (15)