CVE-2026-2748

S/MIME Certificate Subject Whitespace

CVSS 7.8 HIGHEPSS 0.1%CWE-295

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

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:H/SA:N

Produtos afetados

SEPPmail · Secure Email Gateway

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Referências

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