CVE-2023-40396

HIGHNVD 7.86.6▼

7.8

The issue was addressed with improved memory handling. This issue is fixed in iOS 17 and iPadOS 17, macOS Sonoma 14, watchOS 10, tvOS 17. An app may be able to execute arbitrary code with kernel privileges.

CVSS v3: 7.8
EG Score: 6.6(medium)
EPSS: 47.9%
KEV: Not listed

Published

July 29, 2024

Last Modified

March 19, 2025

References (8)

product-security@applehttps://support.apple.com/en-us/HT213936
product-security@applehttps://support.apple.com/en-us/HT213937
product-security@applehttps://support.apple.com/en-us/HT213938
product-security@applehttps://support.apple.com/en-us/HT213940
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213936
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213937
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213938
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT213940

Weakness Classification(1)

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

CWE-77Command Injection

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch

Frequently asked(5)

What is CVE-2023-40396?

CVE-2023-40396 is a high vulnerability published on July 29, 2024. The issue was addressed with improved memory handling. This issue is fixed in iOS 17 and iPadOS 17, macOS Sonoma 14, watchOS 10, tvOS 17. An app may be able to execute arbitrary code with kernel privileges.

When was CVE-2023-40396 disclosed?

CVE-2023-40396 was first published in the National Vulnerability Database on July 29, 2024, with the most recent update on March 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-40396 actively exploited?

CVE-2023-40396 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-40396?

CVE-2023-40396 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.6.

How do I remediate CVE-2023-40396?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40396, 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-2023-40396

Explore →

Is Your Infrastructure Affected by CVE-2023-40396?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2023-40396

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-40396?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)