Windows 95, when Remote Administration and File Sharing for NetWare Networks is enabled, creates a share (C$) when an administrator logs in remotely, which allows remote attackers to read arbitrary files by mapping the network drive.
https://euvd.enisa.europa.eu/vulnerability/EUVD-1999-1086
http://www.zdnet.com/eweek/reviews/1016/tr42bug.html