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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…
High10.0EPSS 2.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 2.2% · top 17% of all CVEs (5 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (3)
- 17824 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- ultr@vnc-mslogon-weak-encryption(26283) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20060502 Vulnerability in the way [email protected] handles MS-Logon Authentication. (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2006-2206)Record last updated .