CVE-2026-29144: Seppmail Secure Email Gateway

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.

Affected products

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

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