SEPPmail Secure Email Gateway before version 15.0.1 does not properly sanitize the headers from S/MIME protected MIME entities, allowing an attacker to control trusted headers.
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 20:15:00 +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 does not properly sanitize the headers from S/MIME protected MIME entities, allowing an attacker to control trusted headers.
Title S/MIME Decryption Tag Sanitization Bypass
First Time appeared Seppmail
Seppmail seppmail Secure Email Gateway
Weaknesses CWE-20
CPEs cpe:2.3:a:seppmail:seppmail_secure_email_gateway:*:*:*:*:*:*:*:*
Vendors & Products Seppmail
Seppmail seppmail Secure Email Gateway
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published:

Updated: 2026-03-04T19:41:41.356Z

Reserved: 2026-02-19T13:56:28.869Z

Link: CVE-2026-27443

cve-icon Vulnrichment

Updated: 2026-03-04T19:41:34.986Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-04T09:15:56.307

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

Link: CVE-2026-27443

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses