HarborGuard / CVE
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HIGHCVE-2026-2748Published Modified CNA NCSC.ch

CVE-2026-2748: S/MIME Certificate Subject Whitespace

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

Metrics

CVSS v4.0
7.8
Severity
HIGH
Fixed in
15.0.1
Affected Products
1

Fix available

15.0.1
Affected packages
  • SEPPmail / Secure Email Gateway
    < 15.0.1 (from 0)
CVSS Vector
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
References