The issue is related to incorrect session management in IBM i Access Client Solutions, which can allow an attacker to intercept a user's session and disclose protected NT LAN Manager (NTLM) hash information. If NTLM is enabled, the Windows operating system will attempt to authenticate using the current user's session, potentially allowing a hostile server to capture the NTLM hash information and obtain the user's credentials. This is achieved by modifying UNC capable paths within the ACS configuration files to point to a hostile server.