VULNERABILITY INTELLIGENCE

CVE-2026-2748

CVSS score7.8 HIGH
EPSS probability0.13%
CISA KEVNot currently listed
Published2026-03-04
Last modified2026-06-17
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:H/SA:N

Description

SEPPmail Secure Email Gateway before version 15.0.1 improperly validates S/MIME certificates issued for email addresses containing whitespaces, allowing signature spoofing.

Weakness classification

  • CWE-295: Improper Certificate Validation

Primary references