Information Disclosure via Email Address in SEPPmail Secure Email Gateway

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 attackers with a specially crafted email address to read the contents of emails encrypted for other users.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-02

Last Modified

2026-04-16

Generated

2026-07-06

AI Q&A

2026-04-02

EPSS Evaluated

2026-07-05

NVD

CVE-2026-29131

EUVD

EUVD-2026-18142

Affected Vendors & Products

Vendor	Product	Version / Range
seppmail	secure_email_gateway	to 15.0.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-90	The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability exists in SEPPmail Secure Email Gateway versions before 15.0.3. It allows attackers who use a specially crafted email address to read the contents of emails that are encrypted for other users.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive email content. Attackers exploiting this flaw can access encrypted emails intended for other users, potentially exposing confidential information.

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