The Trend Micro HouseCall ActiveX control 6.51.0.1028 and 6.6.0.1278 in Housecall_ActiveX.dll allows remote attackers to download an arbitrary library file onto a client system via a "custom update server" argument. NOTE: this can be leveraged for code execution by writing to a Startup folder.
https://exchange.xforce.ibmcloud.com/vulnerabilities/47524
http://www.vupen.com/english/advisories/2008/3464
http://www.securityfocus.com/bid/32965
http://www.securityfocus.com/archive/1/499495/100/0/threaded
http://www.kb.cert.org/vuls/id/541025
http://securityreason.com/securityalert/4802
http://secunia.com/secunia_research/2008-32/
http://secunia.com/advisories/31337
http://esupport.trendmicro.com/support/viewxml.do?ContentID=EN-1038646&id=EN-1038646