IIS 4.0 and 5.0 does not properly perform ISAPI extension processing if a virtual directory is mapped to a UNC share, which allows

Microsoft Commercial Internet System (MCIS) IMAP server allows remote attackers to cause a denial of service via a malformed IMAP

IIS FTP servers may allow a remote attacker to read or delete files on the server, even if they have "No Access" permissions.

Microsoft Site Server and Commercial Internet System (MCIS) do not set an expiration for a cookie, which could then be cached by a

Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.

Race condition in the SSL ISAPI filter in IIS and other servers may leak information in plaintext.