PT-2026-29695 · Seppmail · Seppmail Secure Email Gateway

Andris Suter-Dörig + 2 · CVE-2026-29134 · Published 2026-04-02 · Updated 2026-04-02

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions SEPPmail Secure Email Gateway versions prior to 15.0.3

Description SEPPmail Secure Email Gateway before version 15.0.3 has an issue where an external user can modify GINA webdomain metadata, leading to a bypass of per-domain restrictions.

Recommendations Update SEPPmail Secure Email Gateway to version 15.0.3 or later.

Fix

Weakness Enumeration

CWE-807

Related Identifiers

CVE-2026-29134

Affected Products

Seppmail Secure Email Gateway

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-29134 · Security Note
• https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure-1503 · Note
• https://twitter.com/CVEnew/status/2039647698123620632 · Twitter Post