{"cve":"CVE-2006-2206","nvd":{"published":"2006-05-05T12:46:00.000","modified":"2026-06-16T22:24:32.750","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["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"],"products":["ultravnc:ultravnc"],"source":"nvd","synced_at":"2026-10-19T19:42:01.759833969+00:00"},"epss":{"cve":"CVE-2006-2206","score":0.02192,"percentile":0.82453,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}