CVE-2023-40440 - Vulnerability Details - OpenCVE

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.

Published: 2023-09-11

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

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 vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

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.

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.

The EPSS score is 0.00138.

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

Wed, 25 Jun 2025 14:15:00 +0000

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

Subscriptions

Apple Macos

MITRE

Status: PUBLISHED

Assigner: apple

Published: 2023-09-11T23:29:25.854Z

Updated: 2025-06-25T13:43:30.077Z

Reserved: 2023-08-14T20:26:36.261Z

Link: CVE-2023-40440

Vulnrichment

Updated: 2024-08-02T18:31:53.795Z

NVD

Status : Modified

Published: 2023-09-12T00:15:09.133

Modified: 2025-06-25T14:15:21.393

Link: CVE-2023-40440

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-noinfo

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