Race condition in Panda ActiveScan 5.53.00, and other versions before 5.54.01, allows remote attackers to cause memory corruption and execute arbitrary code via unknown vectors related to multiple invocations of the Analizar method in the ActiveScan.1 ActiveX control, which is not thread safe.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30319
http://www.vupen.com/english/advisories/2006/4536
http://www.securityfocus.com/bid/21132
http://www.securityfocus.com/archive/1/451864/100/0/threaded