CVE-2025-54159 is a missing authorization vulnerability identified in Synology BeeDrive for desktop software versions prior to 1.4.2-13960. The vulnerability allows remote attackers to delete arbitrary files on the affected system without requiring any authentication or user interaction. This indicates a critical flaw in the access control mechanisms of the BeeDrive application, where authorization checks are either missing or improperly implemented. The vulnerability is exploitable remotely over the network (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The impact is primarily on the integrity of the system, as attackers can delete files arbitrarily, potentially leading to data loss or disruption of services relying on those files. Confidentiality and availability are not directly impacted according to the CVSS vector. The vulnerability affects all versions before 1.4.2-13960, and no patches or exploit code were listed at the time of publication. Although no known exploits are currently in the wild, the vulnerability's characteristics make it a high-risk issue that could be leveraged in targeted attacks or ransomware campaigns to destroy data and hinder recovery efforts. The root cause is likely a failure to enforce proper authorization checks on file deletion operations within the BeeDrive desktop client, exposing a critical security gap in Synology's software.

For European organizations, this vulnerability poses a significant risk to data integrity and operational continuity. Organizations using Synology BeeDrive for desktop to manage or synchronize files could suffer unauthorized file deletions, leading to data loss, disruption of business processes, and potential compliance violations under regulations like GDPR if data availability or integrity is compromised. Critical sectors such as finance, healthcare, and government agencies that rely on Synology solutions for secure file storage and sharing may face operational downtime or costly recovery efforts. The ease of exploitation without authentication increases the threat surface, especially if the BeeDrive service is exposed to untrusted networks or the internet. While confidentiality is not directly impacted, the loss of important files could indirectly affect data confidentiality if backups or logs are deleted. The absence of known exploits currently provides a window for mitigation, but the high CVSS score (7.5) and the nature of the vulnerability demand immediate attention to prevent potential targeted attacks or insider threats exploiting this flaw.

1. Immediately update Synology BeeDrive for desktop to version 1.4.2-13960 or later where the vulnerability is patched. 2. Restrict network access to BeeDrive services by implementing firewall rules and network segmentation to limit exposure to trusted internal networks only. 3. Disable remote access features or VPN connections to BeeDrive if not strictly necessary. 4. Monitor file deletion logs and audit trails for unusual or unauthorized activities to detect potential exploitation attempts early. 5. Implement strict access controls and user permissions on systems running BeeDrive to minimize the impact of any unauthorized actions. 6. Regularly back up critical data stored or synchronized via BeeDrive to secure, offline, or immutable storage to enable recovery in case of data deletion. 7. Educate IT staff and users about the vulnerability and the importance of applying updates promptly. 8. Consider deploying endpoint detection and response (EDR) tools to identify suspicious behaviors related to file deletions on affected endpoints.