CVE-2006-2206
The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR)...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2006-2206- CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2006-2206- Updated
- 2026-11-02
EUVDEUVD-2006-2207 No score
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.
- Record
EUVD-2006-2207- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7p8q-42p8-hwxr No score
The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR)...
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.
- Record
GHSA-7p8q-42p8-hwxr- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2006-2206 is a high vulnerability (CVSS 10.0) in Ultravnc, published May 5, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.19%, the 82nd percentile. No source names a fixed version.