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CVE-2026-27443

HIGH CVSS 4.0: 8.2 EPSS 0.11%
Updated Mar 05, 2026
Seppmail
Parameter Value
CVSS 8.2 (HIGH)
Affected Versions before 15.0.1
Fixed In 15.0.1
Type CWE-20 (Improper Input Validation)
Vendor Seppmail
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Seppmail Seppmail
cpe:2.3:a:seppmail:seppmail:*:*:*:*:*:*:*:*
15.0.1