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CVE-2026-29143

CRITICAL CVSS: 9.1 Published: 2026-04-02 Modified: 2026-06-17

Description

SEPPmail Secure Email Gateway before version 15.0.3 does not properly authenticate the inner message of S/MIME-encrypted MIME entities, allowing an attacker to control trusted headers.

Affected Platforms

Seppmail Secure Email Gateway

Weakness Type

CWE-20

References