CVE-2023-40440

View on CVE.org

Published Sep 11, 2023 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

macOS

affected

Version	Status	Constraints
`unspecified`	affected	< 12.6

Configuration 1 [-]

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

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2023-45011	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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.548% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://blog.aegrel.ee/apple-mail-smime.html
https://support.apple.com/en-us/HT213844

History

Jun 25, 2025 2:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Apple Macos

Weaknesses

NVD-CWE-noinfo

Sources

CVE record Updated: Jun 25, 2025, 1:43 PM

Status: PUBLISHED
Assigner: apple
Published: Sep 11, 2023, 11:29 PM
Updated: Jun 25, 2025, 1:43 PM
Reserved: Aug 14, 2023, 8:26 PM

View source JSON

Vulnrichment Updated: Aug 2, 2024, 6:31 PM

Updated: Aug 2, 2024, 6:31 PM

NVD Updated: Jun 17, 2026, 6:17 AM

Status: Modified
Published: Sep 12, 2023, 12:15 AM
Modified: Jun 17, 2026, 6:17 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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