{"id":"CVE-2026-107573","published":"2026-10-08T12:17:15.027","lastModified":"2026-10-08T21:02:43.860","description":"Incorrect default permissions in the Windows installer of Progressive Robot hMailServer 6.0.0 through 6.3.5 allow a local authenticated user to read the mail server's data. The installer created the data, log, temp, database and event folders and the hMailServer.INI configuration file with the permissions inherited from the installation folder, by default under Program Files, which give the local Users group read access. Any user who can sign in to the computer could read every stored message, the logs, the built-in database with the accounts' password hashes whenever the service is stopped, and the configuration file, including the database password, which is sealed only with the machine's DPAPI key and can be unsealed by any local account; with an external database that password gives full control of it. The Linux AppImage of 6.3.0 through 6.3.5 likewise created its per-user data folders readable by other local users.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-276"],"vendors":[],"products":[],"references":[{"url":"https://gitlab.com/hmailserver/hmailserver/-/releases/v6.3.6","tags":[]},{"url":"https://gitlab.com/hmailserver/hmailserver/-/work_items/77","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"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.","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.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["privilege-escalation","data-exfiltration","misconfiguration"],"model":"garnet-coder","analyzedAt":"2026-10-16T09:22:26.057Z"}}