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

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 04 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 04 Mar 2026 09:15:00 +0000

Type Values Removed Values Added
Description SEPPmail Secure Email Gateway before version 15.0.1 improperly validates S/MIME certificates issued for email addresses containing whitespaces, allowing signature spoofing.
Title S/MIME Certificate Subject Whitespace
First Time appeared Seppmail
Seppmail seppmail Secure Email Gateway
Weaknesses CWE-295
CPEs cpe:2.3:a:seppmail:seppmail_secure_email_gateway:*:*:*:*:*:*:*:*
Vendors & Products Seppmail
Seppmail seppmail Secure Email Gateway
References
Metrics cvssV4_0

{'score': 7.8, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published:

Updated: 2026-03-04T16:55:03.279Z

Reserved: 2026-02-19T13:56:33.534Z

Link: CVE-2026-2748

cve-icon Vulnrichment

Updated: 2026-03-04T16:54:59.084Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-04T09:15:58.290

Modified: 2026-03-04T18:08:05.730

Link: CVE-2026-2748

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses