{"cve":"CVE-2006-3551","nvd":{"published":"2006-07-13T00:05:00.000","modified":"2026-06-16T22:27:17.603","status":"Modified","description":"NCP Secure Enterprise Client (aka VPN/PKI client) 8.30 Build 59, and possibly earlier versions, when the Link Firewall and Personal Firewall are both configured to block all inbound and outbound network traffic, allows context-dependent attackers to send inbound UDP traffic with source port 67 and destination port 68, and outbound UDP traffic with source port 68 and destination port 67.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/047547.html","https://exchange.xforce.ibmcloud.com/vulnerabilities/27484","http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/047547.html","https://exchange.xforce.ibmcloud.com/vulnerabilities/27484"],"products":["ncp_network_communications:secure_client"],"source":"nvd","synced_at":"2026-10-19T19:42:44.451428143+00:00"},"epss":{"cve":"CVE-2006-3551","score":0.00269,"percentile":0.19153,"date":"2026-10-31"},"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."]}