CVE-2026-29134
Received Received - Intake
Metadata Modification Vulnerability in SEPPmail Gateway Enables Bypass

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 external user to modify GINA webdomain metadata and bypass per-domain restrictions.
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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-2026-29134
EUVD
EUVD-2026-18148
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-807 The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.
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Executive Summary

This vulnerability affects SEPPmail Secure Email Gateway versions before 15.0.3. It allows an external user to modify the GINA webdomain metadata, which in turn enables them to bypass restrictions that are set on a per-domain basis.

Impact Analysis

By exploiting this vulnerability, an external attacker could alter domain-specific metadata and bypass domain restrictions. This could potentially allow unauthorized access or actions that are normally restricted by domain policies, leading to security breaches or misuse of the email gateway.

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