CVE-2026-29144

MEDIUM

SEPPmail Secure Email Gateway - Unicode Subject Tags

Title source: manual

Description

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.

References (1)

Core 1

Core References

Release Notes release-notes

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure-1503

Scores

CVSS v3 5.3

EPSS 0.0021

EPSS Percentile 11.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-20

Status published

Products (2)

SEPPmail/Secure Email Gateway < 15.0.3

seppmail/secure_email_gateway < 15.0.3

Published Apr 02, 2026

Tracked Since Apr 02, 2026