CVE-2026-107573

Summary

A local authenticated user can read sensitive mail server data due to overly permissive default folder and file permissions created during installation. This allows access to stored messages, logs, password hashes, and configuration files that contain database passwords.

Exploitability

Exploitation is straightforward for any local user who can sign into the system, requiring no special privileges or network access beyond basic authentication.

Blast radius

The impact affects all users on the machine since the installer sets permissions that allow read access to mail data and configuration files by the local Users group, potentially exposing sensitive email content and authentication credentials.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to Progressive Robot hMailServer version 6.3.6 or later, which fixes the default permission issues in both Windows installer and Linux AppImage components.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.