Vulnerability Report

CVE-2006-2206

Title: Ultravnc Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2006-2206.

CWE Category NVD-CWE-noinfo

Published Date May 05, 2006

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 10.0 CVSS v2.0

Exploit Probability (EPSS)

2.14%

Vulnerability Summary

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.

Impacted Vendors

ultravnc 1

uvnc 1

Reference Links

http://archives.neohapsis.com/archives/bugtraq/2006-05/0057.html http://www.securityfocus.com/bid/17824 https://exchange.xforce.ibmcloud.com/vulnerabilities/26283 http://archives.neohapsis.com/archives/bugtraq/2006-05/0057.html http://www.securityfocus.com/bid/17824 https://exchange.xforce.ibmcloud.com/vulnerabilities/26283

CVSS v2.0

Source Entity [email protected]

Severity HIGH

10.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2006-2206 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 03, 2025 MODIFIED

Vulnerability data or affected products updated.

May 05, 2006 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected Stack

No specific products linked.