A typographical error in the script source access permissions for Internet Information Server (IIS) 5.0 does not properly exclude .COM files, which allows attackers with only write permissions to upload malicious .COM files, aka "Script Source Access Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A931
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-062
http://www.securityfocus.com/bid/6071
http://www.securityfocus.com/bid/6068