The Alibaba Alipay PTA Module ActiveX control (PTA.DLL) allows remote attackers to execute arbitrary code via a JavaScript function that invokes the Remove method with an invalid index argument, which is used as an offset for a function call.
https://www.exploit-db.com/exploits/3279
https://exchange.xforce.ibmcloud.com/vulnerabilities/32367
http://www.vupen.com/english/advisories/2007/0520
http://secunia.com/advisories/24063
http://lists.grok.org.uk/pipermail/full-disclosure/2007-February/052250.html