CVE-2026-2748

MEDIUM

SEPPmail Secure Email Gateway <15.0.1 - Auth Bypass

Title source: llm
STIX 2.1

Description

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

References (1)

Scores

CVSS v3 5.3
EPSS 0.0002
EPSS Percentile 6.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-295
Status published
Products (1)
seppmail/seppmail < 15.0.1
Published Mar 04, 2026
Tracked Since Mar 04, 2026