CVE-2026-44127: Seppmail AG Secure Email Gateway

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

SEPPmail Secure Email Gateway before version 15.0.4 contains an unauthenticated path traversal vulnerability in the identifier parameter of /api.app/attachment/preview that allows remote attackers to read arbitrary local files and trigger deletion of files in the targeted directory with the privileges of the api.app process.

Affected products

• Seppmail AG Secure Email Gateway: before 15.0.4 (fixed in 15.0.4)

Published 2026-05-08. Last modified 2026-06-17.