Help Center (HelpCtr.exe) may allow remote attackers to read or execute arbitrary files via an "http://" or "file://" argument to the topic parameter in an hcp:// URL. NOTE: since the initial report of this problem, several researchers have been unable to reproduce this issue.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15101
http://marc.info/?l=bugtraq&m=107652584102003&w=2
http://archives.neohapsis.com/archives/fulldisclosure/2004-02/0688.html
http://archives.neohapsis.com/archives/fulldisclosure/2004-02/0450.html