{"id":"CVE-2006-2206","aliases":["EUVD-2006-2207","GHSA-7p8q-42p8-hwxr"],"status":"published","title":"The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR)...","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.","severity":{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02192,"percentile":0.82569,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-05-05T10:00:00Z","modified":"2026-06-16T22:24:32Z","products":[{"vendor":"ultravnc","product":"ultravnc"}],"references":[{"url":"http://www.securityfocus.com/bid/17824","tags":["vdb-entry","x_refsource_BID","x_transferred","Exploit"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/26283","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://archives.neohapsis.com/archives/bugtraq/2006-05/0057.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-2206"},{"url":"https://github.com/advisories/GHSA-7p8q-42p8-hwxr"}],"sources":{"cve":[{"id":"CVE-2006-2206","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.","status":"published","published":"2006-05-05T10:00:00Z","modified":"2024-08-07T17:43:27.737Z","updated_at":"2026-11-02T14:33:48.500736Z"}],"euvd":[{"id":"EUVD-2006-2207","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.","status":"published","published":"2006-05-05T10:00:00Z","modified":"2024-08-07T17:43:27Z","updated_at":"2026-11-03T01:16:01.8348Z"}],"ghsa":[{"id":"GHSA-7p8q-42p8-hwxr","title":"The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR)...","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.","status":"published","published":"2022-05-01T06:56:57Z","modified":"2023-01-31T05:01:06Z","updated_at":"2026-11-02T14:47:59.599725Z"}],"nvd":[{"id":"CVE-2006-2206","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.","status":"published","published":"2006-05-05T12:46:00Z","modified":"2026-06-16T22:24:32.75Z","cvss":[{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:02.98271Z"}]}}