CVE-2006-2206

critical

Description

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.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/26283

http://archives.neohapsis.com/archives/bugtraq/2006-05/0057.html

Details

Source: Mitre, NVD

Published: 2006-05-05

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H