CVE-2026-29140
S/MIME Signature Additional Certificate
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
6th
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to cause attacker-controlled certificates to be used for future encryption to a victim by adding the certificates to S/MIME signatures.
| CWE | CWE-295 |
| Vendor | seppmail |
| Product | secure email gateway |
| Published | Apr 2, 2026 |
| Last Updated | Apr 2, 2026 |
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Affected Versions
SEPPmail / Secure Email Gateway
0 < 15.0.3
References
Credits
Andris Suter-Dörig Matteo Scarlata Kenny Paterson