KEPServerEX v6.0 to v6.9 ThingWorx Kepware Server v6.8 and v6.9 ThingWorx Industrial Connectivity (all versions) OPC-Aggregator (all versions) Rockwell Automation KEPServer Enterprise GE Digital Industrial Gateway Server v7.68.804 and v7.66 and Software Toolbox TOP Server all 6.x versions are vulnerable to a heap-based buffer overflow. Opening a specifically crafted OPC UA message could allow an attacker to crash the server and potentially leak data.