Note: A computer is only vulnerable if it has File and Print Sharing enabled, and has password-protection enabled for at least one shared folder.
Windows 98 incorporates peer-to-peer networking capabilities that allow you to share files and folders on a network or within a workgroup. You must enable the File and Print Sharing service and change the properties of a folder in order to create a folder share, and make the folder accessible to others on the network.
Share level security requires users on a network to enter a password to gain access to a shared folder.
For more information about this vulnerability, please read Microsoft Knowledge Base (KB) Article Q273991.