The Trend Micro Personal Firewall service (aka TmPfw.exe) in Trend Micro Network Security Component (NSC) modules, as used in Trend Micro OfficeScan 8.0 SP1 Patch 1 and Internet Security 2007 and 2008 17.0.1224, relies on client-side password protection implemented in the configuration GUI, which allows local users to bypass intended access restrictions and change firewall settings by using a modified client to send crafted packets.
https://exchange.xforce.ibmcloud.com/vulnerabilities/48108
http://www.vupen.com/english/advisories/2009/0191
http://www.trendmicro.com/ftp/documentation/readme/OSCE8.0_SP1_Patch1_CriticalPatch_3191_Readme.txt
http://www.securitytracker.com/id?1021617
http://www.securitytracker.com/id?1021616
http://www.securityfocus.com/bid/33358
http://secunia.com/secunia_research/2008-43/