CVE-2026-29141
Received Received - Intake
Subject Sanitization Bypass in SEPPmail Gateway Allows Tag Forgery

Publication date: 2026-04-02

Last updated on: 2026-04-16

Assigner: Switzerland Government Common Vulnerability Program

Description
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge tags such as [signed OK].
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Meta Information
Published
2026-04-02
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-02
EPSS Evaluated
2026-06-15
NVD
CVE-2026-29141
EUVD
EUVD-2026-18162
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
seppmail secure_email_gateway to 15.0.3 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
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Executive Summary

This vulnerability affects SEPPmail Secure Email Gateway versions before 15.0.3. It allows an attacker to bypass the subject sanitization process and forge tags such as [signed OK] in email subjects.

Impact Analysis

By exploiting this vulnerability, an attacker can manipulate email subject lines to include forged tags like [signed OK], potentially misleading recipients about the authenticity or integrity of the email.

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