Lucent VitalSuite 8.0 through 8.2, including VitalNet, VitalEvent, and VitalHelp/VitalAnalysis, allows remote attackers to bypass authentication via a direct HTTP request to the VsSetCookie.exe program, which returns a valid cookie for the desired user.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-0233
http://www.securityfocus.com/bid/3784