Help and Support Center in Microsoft Windows XP SP1 does not properly validate HCP URLs, which allows remote attackers to execute arbitrary code via quotation marks in an hcp:// URL, which are not quoted when constructing the argument list to HelpCtr.exe.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15704
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-011