1. Home
  2. CVE Database
  3. CVE-2026-2748
MEDIUM · 5.3

CVE-2026-2748

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

Vulnerability Description

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

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
SeppmailSeppmail< 15.0.1

Related Weaknesses (CWE)

CWE-295

References

FAQ

What is CVE-2026-2748?

CVE-2026-2748 is a vulnerability with a CVSS score of 5.3 (MEDIUM). SEPPmail Secure Email Gateway before version 15.0.1 improperly validates S/MIME certificates issued for email addresses containing whitespaces, allowing signature spoofing.

How severe is CVE-2026-2748?

CVE-2026-2748 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-2748?

Check the references section above for vendor advisories and patch information. Affected products include: Seppmail Seppmail.