CVE-2026-18187

An HTTP header injection vulnerability in start-page-loader.cgi of ADM allows an unauthenticated remote attacker to read arbitrary files on the host system. By sending a crafted HTTP request with injected headers via the state parameter, the attacker can leverage the underlying web server's X-Sendfile mechanism to retrieve sensitive files without authentication.

A stack-based buffer overflow vulnerability was found in the File Explorer on ADM. User-controlled input is not properly validated before being decoded and copied into a fixed-size stack buffer, potentially causing denial of service of the CGI process.

A path traversal vulnerability was found in the IHM Log handling of ADM. User-controlled disk serial input is not sufficiently validated before being used to construct the path of an IHM log database file.

A path traversal vulnerability in the Wallpaper component of ADM. User-controlled wallpaper path input is not sufficiently validated, allowing access to files outside the intended wallpaper directory.

A path traversal vulnerability was found in the VPN Clients on ADM. User-controlled certificate name input is not sufficiently validated before being used to construct the upload destination path.

A format string vulnerability was found in the Notification OAuth settings of ADM. User-controlled notification configuration input may be processed through an unsafe format string operation.

A format string vulnerability was found in the Rsync Backup on ADM. User-controlled rsync backup configuration or log data may be processed through an unsafe format string operation.

A stored format string vulnerability in the FTP Backup function of ADM. User-controlled backup configuration data is logged and later processed unsafely, allowing memory disclosure or denial of service.

When a user configures the NAS to retrieve UPS status or control the UPS, a non-enforced TLS certificate verification can allow an attacker able to intercept network traffic to perform a man-in-the-middle (MITM) attack, which may obtain sensitive information of the UPS server configuration. This issue affects ADM from 4.1.0 through 4.3.3.RKD2 and from 5.0.0 through 5.1.0.RN42.

When the user sets the Notification's sender to send emails to the SMTP server via msmtp, improperly validated TLS/SSL certificates allow an attacker who can intercept network traffic between the SMTP client and server to execute a man-in-the-middle (MITM) attack, which may obtain sensitive SMTP information.