CVE-2025-5076 is a buffer overflow vulnerability identified in FreeFloat FTP Server version 1.0, specifically within the SEND Command Handler component. This vulnerability arises due to improper handling of input data, allowing an attacker to manipulate the input to overflow a buffer. Buffer overflows can lead to arbitrary code execution, denial of service, or system crashes. The vulnerability is remotely exploitable without requiring authentication or user interaction, increasing its risk profile. Although the CVSS 4.0 base score is 6.9, categorized as medium severity, the potential impact includes partial compromise of confidentiality, integrity, and availability due to the ability to execute code or disrupt service. The vulnerability does not require privileges or user interaction, making it accessible to unauthenticated remote attackers. No patches or mitigations have been officially published yet, and no known exploits are currently reported in the wild. The vulnerability affects only version 1.0 of the FreeFloat FTP Server, which is a niche FTP server product. The lack of a patch and public exploit disclosure means organizations using this software should consider immediate risk mitigation steps to prevent exploitation.

For European organizations, the impact of this vulnerability depends largely on the deployment of FreeFloat FTP Server 1.0 within their infrastructure. If used, exploitation could lead to unauthorized remote code execution, potentially allowing attackers to gain control over affected servers, exfiltrate sensitive data, or disrupt business operations by causing service outages. This could impact confidentiality, integrity, and availability of critical data and services. Given the FTP server’s role in file transfer, compromised servers could be used as pivot points for lateral movement within networks or as staging grounds for further attacks. The medium CVSS score reflects the balance between the ease of exploitation (no authentication or user interaction required) and the limited scope (only one version affected, no known exploits in the wild). European organizations in sectors relying on legacy FTP servers for file transfer, such as manufacturing, logistics, or government agencies, may face increased risk if they have not updated or replaced this software. Additionally, compliance with data protection regulations like GDPR could be jeopardized if data breaches occur due to this vulnerability.

1. Immediate identification and inventory of all FreeFloat FTP Server 1.0 installations within the organization. 2. Disable or isolate affected FTP servers from the internet and internal networks until a patch or update is available. 3. Implement network-level controls such as firewall rules to restrict access to FTP servers only to trusted IP addresses and internal users. 4. Monitor network traffic for unusual FTP commands or anomalous activity targeting the SEND command handler. 5. Consider migrating to a more secure and actively maintained FTP server solution that supports encrypted protocols like FTPS or SFTP. 6. Apply strict access controls and segmentation to limit the impact of any potential compromise. 7. Stay updated with vendor advisories and apply patches immediately once released. 8. Conduct regular vulnerability scans and penetration tests focusing on FTP services to detect exploitation attempts. 9. Educate IT staff about this vulnerability and the importance of securing legacy FTP services.