Webdomain Metadata Manipulation in SEPPmail Secure Email Gateway by SEPPmail
CVE-2026-29134

5.3MEDIUM

Key Information:

Vendor

Seppmail

Status
Secure Email Gateway
Vendor
CVE Published:
2 April 2026

What is CVE-2026-29134?

The SEPPmail Secure Email Gateway prior to version 15.0.3 allows external users to modify GINA webdomain metadata. This manipulation can result in the bypass of per-domain restrictions, posing significant risks to the integrity and security of email communications. Organizations using vulnerable versions should consider upgrading to safeguard against unauthorized alterations to their webdomain metadata.

Affected Version(s)

Secure Email Gateway 0 < 15.0.3

References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.ht...
release-notes

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andris Suter-Dörig
Matteo Scarlata
Kenny Paterson
.