CVE-2025-11619 is a vulnerability classified under CWE-295 (Improper Certificate Validation) affecting Devolutions Server versions up to 2025.3.2. The issue arises because the software fails to properly validate TLS certificates when establishing connections to gateways, which are critical components in remote access and credential management workflows. This improper validation enables attackers who can position themselves as man-in-the-middle (MitM) to intercept encrypted traffic, potentially decrypting, modifying, or injecting malicious content into communications. The vulnerability does not require any privileges and only requires user interaction, such as initiating a connection to a compromised or malicious gateway. The CVSS 3.1 base score of 8.8 reflects the network attack vector, low attack complexity, no privileges required, user interaction needed, and high impact on confidentiality, integrity, and availability. Although no exploits have been reported in the wild yet, the nature of the vulnerability makes it a prime target for attackers aiming to compromise sensitive remote access sessions or steal credentials. Devolutions Server is widely used in enterprise environments for managing remote connections and passwords, making this vulnerability critical for organizations relying on secure remote access. The lack of available patches at the time of publication necessitates immediate risk mitigation through configuration hardening and monitoring.

For European organizations, the impact of CVE-2025-11619 can be severe. Devolutions Server is often used in sectors requiring secure remote access such as finance, healthcare, government, and critical infrastructure. Exploitation could lead to unauthorized disclosure of sensitive credentials, session hijacking, and disruption of remote management operations. This compromises confidentiality and integrity of data, potentially leading to broader network compromise or data breaches. The availability of services may also be affected if attackers disrupt gateway communications. Given the interconnected nature of European IT environments and regulatory requirements such as GDPR, exploitation could result in significant legal and financial consequences. Organizations relying on Devolutions Server for centralized credential management and remote access are at heightened risk, especially if they have not implemented additional layers of security such as network segmentation or multi-factor authentication.

1. Apply official patches from Devolutions immediately once they become available to address the certificate validation flaw. 2. Until patches are released, enforce strict TLS certificate validation policies by configuring Devolutions Server and client settings to reject untrusted or self-signed certificates. 3. Implement network-level protections such as TLS interception detection tools and intrusion detection systems to monitor for anomalous MitM activity. 4. Use network segmentation to isolate Devolutions Server and gateways from less trusted network zones. 5. Enforce multi-factor authentication (MFA) for all remote access sessions to reduce the impact of credential compromise. 6. Educate users about the risks of connecting to untrusted gateways and encourage verification of connection endpoints. 7. Regularly audit and review gateway configurations and certificate trust stores to ensure compliance with security policies. 8. Monitor logs for unusual connection attempts or certificate errors that could indicate exploitation attempts.