What is CVE-2023-40440?

CVE-2023-40440 is a high-severity vulnerability in Apple macOS. CVSS score: 7.5/10. Published 2023-09-12.

How severe is CVE-2023-40440?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apple macOS

CVE-2023-40440

This issue was addressed with improved state management of S/MIME encrypted emails. This issue is fixed in macOS Monterey 12.6.8. A S/MIME encrypted email may be inadvertently sent unencrypted.

EPSS: 0.005 (42.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Apple Macos — versions unspecified

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com

Frequently asked questions

What is CVE-2023-40440?: CVE-2023-40440 is a high-severity vulnerability in Apple macOS. CVSS score: 7.5/10. Published 2023-09-12.
How severe is CVE-2023-40440?: High severity. CVSS v3 base score is 7.5 out of 10.