VULNERABILITY INTELLIGENCE

CVE-2026-29143

CVSS score9.1 CRITICAL
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-04-02
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Description

SEPPmail Secure Email Gateway before version 15.0.3 does not properly authenticate the inner message of S/MIME-encrypted MIME entities, allowing an attacker to control trusted headers.

Weakness classification

  • vulnerability@ncsc.ch: CWE-20

Primary references