CVE-2026-29136: Seppmail Secure Email Gateway

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to inject HTML into notification emails about new CA certificates.

Affected products

• Seppmail Secure Email Gateway: before 15.0.3 (fixed in 15.0.3)

Published 2026-04-02. Last modified 2026-06-17.