CVE-2026-29136
Received Received - Intake
HTML Injection in SEPPmail Gateway Notification Emails

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 inject HTML into notification emails about new CA certificates.
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Published
2026-04-02
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-02
EPSS Evaluated
2026-06-14
NVD
CVE-2026-29136
EUVD
EUVD-2026-18152
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-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability exists in SEPPmail Secure Email Gateway versions before 15.0.3. It allows an attacker to inject HTML code into notification emails that inform recipients about new Certificate Authority (CA) certificates.

Impact Analysis

The vulnerability could allow an attacker to manipulate the content of notification emails by injecting malicious HTML. This could potentially lead to phishing attacks, misleading information, or other malicious activities targeting users who receive these emails.

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