CVE-2025-13651 is a vulnerability classified under CWE-497, indicating exposure of sensitive system information to unauthorized actors within the Microcom ZeusWeb product, specifically version 6.1.31. This vulnerability enables an attacker to perform web application fingerprinting remotely without requiring any authentication, user interaction, or privileges. The exposed information could include system configuration details, software versions, or other sensitive metadata that can facilitate further targeted attacks. The CVSS 4.0 base score of 6.9 reflects a medium severity level, primarily due to the ease of exploitation (network accessible, no authentication) but limited impact confined to confidentiality exposure without direct integrity or availability compromise. No patches or known exploits are currently documented, indicating that the vulnerability is newly disclosed and may not yet be actively exploited. The vulnerability's exploitation vector is network-based, making it accessible to any attacker able to reach the ZeusWeb interface. The lack of authentication or user interaction requirements increases the risk of automated scanning and reconnaissance campaigns. The exposure of sensitive information can aid attackers in identifying system weaknesses, software versions, or configurations, which can be leveraged in subsequent attacks such as privilege escalation, code injection, or denial of service. Given the nature of ZeusWeb as a web application platform, the vulnerability likely arises from improper access controls or information leakage through error messages, headers, or API responses. Organizations running ZeusWeb 6.1.31 should assess their exposure, especially if the application is internet-facing or accessible from untrusted networks.

For European organizations, the exposure of sensitive system information can significantly increase the risk profile by enabling attackers to gather intelligence for more sophisticated attacks. While the vulnerability itself does not allow direct system compromise, it facilitates reconnaissance that can lead to exploitation of other vulnerabilities or unauthorized access. Critical infrastructure operators, government agencies, and enterprises relying on Microcom ZeusWeb for web services may face increased risk of targeted attacks, especially if the exposed information reveals internal network details or software versions. The medium severity rating suggests that while immediate damage is limited, the vulnerability can be a stepping stone in multi-stage attacks. Organizations in sectors such as energy, telecommunications, and manufacturing—where Microcom products may be deployed—could see elevated risk. Additionally, the lack of known exploits currently provides a window for proactive mitigation before attackers develop weaponized exploits. Failure to address this vulnerability could result in increased reconnaissance activity, leading to potential data breaches, service disruptions, or compliance violations under regulations like GDPR if sensitive data is indirectly exposed.

To mitigate CVE-2025-13651, European organizations should first verify if they are running Microcom ZeusWeb version 6.1.31 and prioritize upgrading to a patched version once available. In the absence of an official patch, organizations should implement strict network access controls to limit exposure of the ZeusWeb interface to trusted internal networks only, employing firewalls and VPNs. Deploy web application firewalls (WAFs) configured to detect and block fingerprinting or reconnaissance attempts targeting ZeusWeb. Conduct regular security audits and penetration testing to identify information leakage vectors within the application. Disable or restrict verbose error messages, debug information, and unnecessary HTTP headers that may reveal system details. Monitor network traffic and logs for unusual scanning or fingerprinting activity indicative of exploitation attempts. Employ network segmentation to isolate critical systems running ZeusWeb from general user networks. Finally, maintain up-to-date asset inventories and vulnerability management processes to ensure timely detection and remediation of similar issues.