How severe is CVE-2024-40803?

CVE-2024-40803 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-40803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-40803?

CVE-2024-40803 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-40803?

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.

Does CVE-2024-40803 have an EU (EUVD) identifier?

Yes. CVE-2024-40803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38644.

When was CVE-2024-40803 published?

CVE-2024-40803 was published on 2024-07-29 and last updated on 2026-06-17.

CVE-2024-40803

CVE-2024-40803 is a high-severity vulnerability in Apple Macos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-843.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-38644
Weakness: CWE-843
Affected product: Apple Macos
Published: 2024-07-29
Last modified: 2026-06-17

Description

A type confusion issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.7.6, macOS Sonoma 14.6, macOS Ventura 13.6.8. An attacker may be able to cause unexpected app termination.

Frequently asked questions

What is CVE-2024-40803?: A type confusion issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.7.6, macOS Sonoma 14.6, macOS Ventura 13.6.8. An attacker may be able to cause unexpected app termination.
How severe is CVE-2024-40803?: CVE-2024-40803 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-40803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-40803?: CVE-2024-40803 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-40803?: 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.
Does CVE-2024-40803 have an EU (EUVD) identifier?: Yes. CVE-2024-40803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38644.
When was CVE-2024-40803 published?: CVE-2024-40803 was published on 2024-07-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

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