No exploitation reportedFix available

CVE-2024-40803

Q: Is CVE-2024-40803 actively exploited?

Active exploitation of CVE-2024-40803 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2024-40803?

CVE-2024-40803 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2024-07-29
Fixed in14.6 · 13.6.8 · 12.7.6
WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2024-07-2923:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-40803?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-40803?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple macos

Branch	Affected	Fixed in	Source
14.x	≥ 14.0, < 14.6	14.6	NVD
13.x	≥ 13.0, < 13.6.8	13.6.8	NVD
12.7	< 12.7.6	12.7.6	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apple macos to 14.6 · 13.6.8 · 12.7.6

Advisories and patches

support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-03-26
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52024-07-31
NVDCVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-8432024-07-31
NVDweakness (CWE)CWE-843read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2024-07-29
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2024-40803?

Is CVE-2024-40803 actively exploited?

Active exploitation of CVE-2024-40803 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-40803?

CVE-2024-40803 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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