CVE-2025-34202 affects Vasion Print Virtual Appliance Host versions prior to 25.2.169 and Application versions prior to 25.2.1518, including both virtual appliance and SaaS deployments. The vulnerability stems from the appliance exposing Docker internal networks in a way that allows an attacker positioned on the same external Layer 2 network segment—or who can manipulate routing to use the appliance as a gateway—to directly access container IP addresses. This bypasses intended network isolation boundaries, exposing internal containerized services such as HTTP APIs, Redis databases, and MySQL servers. Many of these services either do not require authentication or are vulnerable to known exploitation chains, enabling attackers to compromise these services easily. The root cause is the reliance on IP address-based authentication (CWE-291), which is inherently insecure because IP addresses can be spoofed or accessed by attackers sharing the network segment. Exploiting this vulnerability can lead to lateral movement within the network, remote code execution on the appliance or containers, data exfiltration, and ultimately full system compromise. The vulnerability does not require any authentication or user interaction, increasing its risk. The vendor has identified this issue as V-2025-003 and classified it as 'Insecure Access to Docker Instance from WAN.' The CVSS 4.0 base score is 8.7, reflecting high impact on confidentiality, integrity, and availability with low attack complexity and no privileges or user interaction required. No public exploits are known at this time, but the exposure of critical internal services makes this a significant threat vector. The vulnerability affects all versions prior to the fixed releases, and no official patches or mitigations are linked yet, emphasizing the need for immediate network-level controls.

For European organizations, the impact of CVE-2025-34202 can be severe. Organizations relying on Vasion Print Virtual Appliance Host for print management may face risks of unauthorized access to internal container services, leading to potential data breaches, disruption of printing services, and compromise of connected infrastructure. The ability for attackers to perform lateral movement and remote code execution can extend the compromise beyond the print environment, affecting broader IT systems and sensitive data. This is particularly critical for sectors with stringent data protection requirements such as finance, healthcare, and government agencies within Europe, where data confidentiality and service availability are paramount. Additionally, the exposure of internal services like Redis and MySQL without authentication can lead to data exfiltration or manipulation, violating GDPR and other regulatory frameworks. The lack of required authentication and user interaction lowers the barrier for attackers, increasing the likelihood of exploitation in shared or poorly segmented network environments common in enterprise settings. The vulnerability also poses risks to managed service providers and SaaS customers using Vasion Print, potentially impacting multiple clients through a single compromised appliance.

Beyond generic patching advice, European organizations should implement the following specific mitigations: 1) Immediately segment the network to isolate the Vasion Print appliance and its Docker containers from general user and external networks, restricting access to trusted management hosts only. 2) Employ strict firewall rules to block unauthorized Layer 2 access and prevent attackers from reaching the appliance’s internal Docker network. 3) Disable or restrict access to non-essential internal services exposed by the containers, especially those lacking authentication such as Redis and MySQL, or configure them to require strong authentication. 4) Monitor network traffic for unusual routing changes or attempts to access container IP addresses directly, using network intrusion detection systems with Docker-aware capabilities. 5) Implement network access control (NAC) to prevent unauthorized devices from joining the same Layer 2 segment as the appliance. 6) Regularly audit and update appliance configurations to ensure no inadvertent exposure of internal services. 7) Coordinate with Vasion for timely patches and verify updates before deployment in production environments. 8) Conduct penetration testing focused on lateral movement and container network exposure to validate the effectiveness of mitigations.