CVE-2006-2206
The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR) for challenge/response, which allows remote attackers to gain privileges by sniffing and decrypting passwords.
Date published : 2006-05-05
http://www.securityfocus.com/bid/17824
http://archives.neohapsis.com/archives/bugtraq/2006-05/0057.html