CVE-2025-59895 affects Flexense Sync Breeze Enterprise Server version 10.4.18 and Disk Pulse Enterprise version 10.4.18. The vulnerability is classified under CWE-20, indicating improper input validation. Specifically, the flaw exists in the configuration restore functionality, where user-supplied data is not sufficiently validated before being processed. An attacker can exploit this by sending maliciously crafted requests that alter the configuration file, leading to corruption. Once corrupted, the application becomes unresponsive and fails to restart, even manually, due to the invalid configuration state. This results in a denial-of-service condition. The CVSS 4.0 base score is 8.2 (high severity), reflecting the vulnerability's network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and high impact on availability (VA:H). The vulnerability does not affect confidentiality or integrity directly but severely impacts service availability. No patches or exploits are currently publicly available, but the risk remains significant due to the ease of exploitation and potential operational impact.

For European organizations, the primary impact is a disruption of service availability, which can halt critical file synchronization and monitoring operations managed by Sync Breeze Enterprise Server. This can affect business continuity, especially in sectors like finance, manufacturing, healthcare, and government where file integrity and timely synchronization are essential. The inability to restart the service without reinstallation increases downtime and operational costs. Organizations relying on automated configuration restore processes are particularly vulnerable. Additionally, the lack of authentication requirement means attackers can exploit this vulnerability remotely without prior access, increasing the attack surface. The disruption could also affect compliance with data handling and operational resilience regulations prevalent in Europe, such as GDPR and NIS Directive requirements.

Organizations should immediately audit their use of Flexense Sync Breeze Enterprise Server and Disk Pulse Enterprise to identify affected versions (v10.4.18). Until a vendor patch is released, implement network-level protections such as firewall rules to restrict access to the configuration restore functionality to trusted administrators only. Employ intrusion detection/prevention systems (IDS/IPS) to monitor and block suspicious requests targeting configuration restore endpoints. Regularly back up configuration files and maintain offline copies to enable rapid recovery without full reinstallation. Consider isolating the server in a segmented network zone to limit exposure. Monitor logs for unusual configuration restore attempts and establish alerting mechanisms. Engage with Flexense support for updates and patches, and plan for timely application once available. Finally, conduct internal awareness training for administrators about the risks of configuration restore misuse.