CVE-2026-29141 PUBLISHED

Bounded Subject Tag Sanitization

Assigner: NCSC.ch
Reserved: 04.03.2026 Published: 02.04.2026 Updated: 02.04.2026

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge tags such as [signed OK].

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
CVSS Score: 7.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Vendor	SEPPmail
Product	Secure Email Gateway
Versions	Default: unaffected affected from 0 to 15.0.3 (excl.)