{"id":"CVE-2006-3551","aliases":["EUVD-2006-3546","GHSA-8gcg-g8ch-xhqg"],"status":"published","title":"NCP Secure Enterprise Client (aka VPN/PKI client) 8.30 Build 59, and possibly earlier versions,...","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.","severity":{"version":"2.0","score":1.2,"vector":"AV:L/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00269,"percentile":0.19213,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-07-13T00:00:00Z","modified":"2026-06-16T22:27:17Z","products":[{"vendor":"ncp_network_communications","product":"secure_client"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/27484","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/047547.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-3551"},{"url":"https://github.com/advisories/GHSA-8gcg-g8ch-xhqg"}],"sources":{"cve":[{"id":"CVE-2006-3551","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.","status":"published","published":"2006-07-13T00:00:00Z","modified":"2024-08-07T18:30:34.393Z","updated_at":"2026-11-02T14:33:50.024504Z"}],"euvd":[{"id":"EUVD-2006-3546","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.","status":"published","published":"2006-07-13T00:00:00Z","modified":"2024-08-07T18:30:34Z","updated_at":"2026-11-03T01:15:55.832483Z"}],"ghsa":[{"id":"GHSA-8gcg-g8ch-xhqg","title":"NCP Secure Enterprise Client (aka VPN/PKI client) 8.30 Build 59, and possibly earlier versions,...","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.","status":"published","published":"2022-05-01T07:10:06Z","modified":"2023-01-31T05:01:49Z","updated_at":"2026-11-02T14:48:08.305035Z"}],"nvd":[{"id":"CVE-2006-3551","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.","status":"published","published":"2006-07-13T00:05:00Z","modified":"2026-06-16T22:27:17.603Z","cvss":[{"version":"2.0","score":1.2,"vector":"AV:L/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:01:04.288594Z"}]}}