CVE-2026-29136

SEPPmail Secure Email Gateway before version 15.0.4 contains an unauthenticated path traversal vulnerability in the identifier parameter of /api.app/attachment/preview that allows remote attackers to read arbitrary local files and trigger deletion of files in the targeted directory with the privileges of the api.app process.

SEPPmail Secure Email Gateway before version 15.0.4 exposes server environment variables through an unauthenticated endpoint in the new GINA UI, allowing remote attackers to obtain sensitive system information.

SEPPmail Secure Email Gateway before version 15.0.2.1 allows unauthenticated remote code execution in the new GINA UI because an endpoint passes attacker-controlled input from a parameter to Perl's eval.

SEPPmail Secure Email Gateway before version 15.0.4 insecurely deserializes untrusted data, which may allow unauthenticated remote attackers to execute code via a crafted serialized object.

SEPPmail Secure Email Gateway before version 15.0.4 fails to enforce authorization checks for multiple endpoints in the new GINA UI, allowing unauthenticated remote attackers to access functionality that should require a valid session.

SEPPmail Secure Email Gateway before 15.0.6 deserializes attacker-controlled data in a privileged REST import workflow without adequate validation. An attacker with a privileged API token can execute arbitrary commands with "nobody" privileges.

SEPPmail Secure Email Gateway before 15.0.7 creates a fully privileged session before required multi-factor authentication enrollment is completed. An attacker with the password for an MFA-required but unenrolled account can access protected functionality without providing a second factor.

SEPPmail Secure Email Gateway before 15.0.7 contains a command injection vulnerability that allows authenticated administrators to execute commands with elevated privileges.

A vulnerability in SEPPmail Secure Email Gateway and SEPPmail Cloud before version 15.0.4.2 allows an attacker to replay and hijack a user session in the GINA web portal. The session token is disclosed inside the URL and an HTTP header.

SEPPmail Secure Email Gateway before version 15.0.4 contains a server-side template injection vulnerability in the new GINA UI. An attacker can upload a controlled template, allowing for the execution of arbitrary template expressions and potentially achieving remote code execution depending on the enabled template plugins.