CVE-2026-2748

S/MIME Certificate Subject Whitespace PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / product	Versions
SEPPmail / Secure Email Gateway	affected 0 before 15.0.1

CWE

CWE-295

References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.