PT-2023-27454 · Apple · Macos Monterey+1

Taavi Eomäe · Published 2023-07-24 · Updated 2025-06-25 · CVE-2023-40440

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions macOS Monterey versions prior to 12.6.8

Description This issue was addressed with improved state management of S/MIME encrypted emails. A S/MIME encrypted email may be inadvertently sent unencrypted.

Recommendations For versions prior to 12.6.8, update to macOS Monterey 12.6.8 to resolve the issue. As a temporary workaround, consider disabling the use of S/MIME encrypted emails until the update is applied.

Fix

Related Identifiers

CVE-2023-40440

Affected Products

Apple Macos

Macos Monterey

References · 9

• https://support.apple.com/en-us/HT213844 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-40440 · Security Note
• https://osv.dev/vulnerability/CVE-2023-40440 · Vendor Advisory
• https://t.me/cvenotify/126627 · Telegram Post
• https://blog.aegrel.ee/apple-mail-smime.html · Note
• https://twitter.com/CVEnew/status/1701379582966771991 · Twitter Post
• https://twitter.com/cracbot/status/1701838155236970513 · Twitter Post
• https://t.me/cvenotify/69257 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1701469059487875277 · Twitter Post