CVE-2026-29143
S/MIME Decryption Impersonation
- State
- Published
- Severity
- 7.8 High
- Published
- Apr 2, 2026
- Updated
- Apr 2, 2026
- Reserved
- Mar 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.8 High | 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 | NCSC.ch |
Weaknesses
- CWE-20 Improper Input Validation
Affected Products
| Product | Versions |
|---|---|
Secure Email GatewaySEPPmail |
|
References
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