CVE-2025-34235 is a critical security vulnerability classified under CWE-295 (Improper Certificate Validation) affecting Vasion Print Virtual Appliance Host versions prior to 25.1.102 and its Windows client application prior to 25.1.1413. The vulnerability arises from a registry key that administrators can enable, which causes the client to skip SSL/TLS certificate validation during HTTPS communications. This improper validation allows attackers capable of intercepting network traffic (man-in-the-middle attackers) to inject malicious driver DLLs into the client environment. Such injection leads to remote code execution with SYSTEM-level privileges, providing attackers full control over the affected system. Furthermore, local attackers can exploit a junction-point DLL injection technique to escalate privileges locally. The vulnerability does not require user interaction or authentication, making it highly exploitable in network environments where HTTPS interception is possible. While a patch has been confirmed, the timeline for its release remains unclear, leaving many systems potentially exposed. The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H) indicates network attack vector, low complexity, partial attack requirements, no privileges or user interaction needed, and high impact on confidentiality, integrity, and availability. This vulnerability threatens the integrity of print infrastructure by enabling attackers to compromise print clients and hosts, potentially leading to widespread system compromise and disruption of printing services.

For European organizations, the impact of CVE-2025-34235 is substantial. Many enterprises, government agencies, and critical infrastructure operators rely on Vasion Print for centralized print management. Exploitation could lead to complete system compromise of print servers and clients, allowing attackers to execute arbitrary code with SYSTEM privileges. This can result in data breaches, lateral movement within networks, and disruption of printing services critical to business operations. The ability to inject malicious drivers also raises concerns about persistence and stealthy malware deployment. Local privilege escalation further increases the risk from insider threats or compromised endpoints. Given the vulnerability’s network-based exploitation vector, organizations with remote or hybrid work environments are at heightened risk. The lack of clear patch availability timelines may delay remediation, prolonging exposure. Additionally, compromised print infrastructure can serve as a pivot point to attack other critical systems, amplifying the overall security risk.

To mitigate CVE-2025-34235, European organizations should immediately audit their Vasion Print deployments to determine if the vulnerable versions are in use and whether the risky registry key enabling certificate validation bypass is set. Administrators should disable this registry key to enforce proper SSL/TLS certificate validation. If possible, upgrade Vasion Print Virtual Appliance Host to version 25.1.102 or later and the Windows client to version 25.1.1413 or later once patches are confirmed available. Network defenses should be enhanced to detect and block man-in-the-middle attacks, including deploying network segmentation, enforcing strict TLS inspection policies, and using endpoint detection and response (EDR) tools to monitor for suspicious DLL injections. Employing certificate pinning or additional certificate validation mechanisms can reduce the risk of interception. Regularly review and restrict local user permissions to minimize the impact of local privilege escalation attempts. Finally, maintain robust logging and monitoring on print infrastructure components to detect anomalous activities indicative of exploitation attempts.