CVE-2026-27444: Seppmail

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

SEPPmail Secure Email Gateway before version 15.0.1 incorrectly interprets email addresses in the email headers, causing an interpretation conflict with other mail infrastructure that allows an attacker to fake the source of the email or decrypt it.

Affected products

• Seppmail Seppmail: before 15.0.1 (fixed in 15.0.1)

Published 2026-03-04. Last modified 2026-06-17.