CVE-2025-11492 is a vulnerability classified under CWE-319, which concerns the cleartext transmission of sensitive information. In ConnectWise Automate Agent versions prior to 2025.9, communications between the agent and server could be configured to use HTTP rather than HTTPS. This configuration flaw allows an attacker positioned on the network path (man-in-the-middle) to intercept, modify, or replay the traffic exchanged between the agent and the server. The vulnerability arises because HTTP transmits data in plaintext, exposing sensitive information such as authentication tokens, commands, or configuration data. Although some obfuscation was used in earlier versions, it was insufficient to prevent interception or tampering. The vendor addressed this issue in the 2025.9 patch by enforcing HTTPS for all agent communications, thereby ensuring encryption and integrity protection. The CVSS 3.1 score of 9.6 reflects the critical nature of this vulnerability, highlighting its high impact on confidentiality, integrity, and availability, combined with low attack complexity, no required privileges, and no user interaction. No known exploits are currently reported in the wild, but the potential for exploitation is significant given the nature of the vulnerability and the widespread use of ConnectWise Automate in IT service management environments.

For European organizations, this vulnerability poses a severe risk to the confidentiality and integrity of remote monitoring and management operations. Attackers exploiting this flaw could intercept sensitive data, including credentials and management commands, potentially leading to unauthorized access, lateral movement, or disruption of IT services. This could result in data breaches, operational downtime, and reputational damage. Organizations in critical infrastructure sectors, managed service providers, and enterprises relying on ConnectWise Automate for IT operations are particularly vulnerable. The ability to modify or replay traffic further increases the risk of persistent compromise or manipulation of managed endpoints. Given the criticality and ease of exploitation, failure to patch could lead to widespread impact across European IT environments.

Organizations should immediately upgrade ConnectWise Automate Agents to version 2025.9 or later, which enforces HTTPS for all communications, eliminating the risk of cleartext transmission. Network administrators must audit and enforce secure communication policies, ensuring no fallback to HTTP is permitted. Implement network segmentation and monitoring to detect anomalous traffic patterns indicative of man-in-the-middle attacks. Employ TLS inspection and certificate validation to prevent interception by unauthorized entities. Additionally, conduct regular security assessments of remote management tools and enforce strict access controls. Where patching is delayed, consider deploying network-level encryption tunnels (e.g., VPNs) to protect agent-server communications. Finally, educate IT staff on the risks of insecure configurations and the importance of applying vendor patches promptly.