Array index error in Sielco Sistemi Winlog Pro SCADA before 2.07.17 and Winlog Lite SCADA before 2.07.17 might allow remote attackers to execute arbitrary code by referencing, within a port-46824 TCP packet, an invalid file-pointer index that leads to execution of an EnterCriticalSection code block.
http://www.us-cert.gov/control_systems/pdf/ICSA-12-213-01.pdf