Unspecified vulnerability in Microsoft Hyperlink Object Library (hlink.dll), possibly a buffer overflow, allows user-assisted attackers to execute arbitrary code via crafted hyperlinks that are not properly handled when hlink.dll "uses a file containing a malformed function," aka "Hyperlink Object Function Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A115
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-050
http://www.us-cert.gov/cas/techalerts/TA06-220A.html
http://www.securityfocus.com/bid/19405