{"id":"CVE-2006-6266","aliases":["EUVD-2006-6249","GHSA-x63c-6qqq-h574"],"status":"published","title":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity...","description":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity tests (aka ping tests) in response to packets from non-Teredo source addresses, which might allow remote attackers to induce Teredo clients to send packets to third parties.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.12073,"percentile":0.96173,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-12-04T11:00:00Z","modified":"2026-06-16T22:32:48Z","products":[{"vendor":"microsoft","product":"teredo"}],"references":[{"url":"http://www.symantec.com/avcenter/reference/Teredo_Security.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/archive/1/452996/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/452989/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-6266"},{"url":"https://github.com/advisories/GHSA-x63c-6qqq-h574"}],"sources":{"cve":[{"id":"CVE-2006-6266","description":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity tests (aka ping tests) in response to packets from non-Teredo source addresses, which might allow remote attackers to induce Teredo clients to send packets to third parties.","status":"published","published":"2006-12-04T11:00:00Z","modified":"2024-08-07T20:19:35.108Z","updated_at":"2026-11-02T14:33:50.374603Z"}],"euvd":[{"id":"EUVD-2006-6249","description":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity tests (aka ping tests) in response to packets from non-Teredo source addresses, which might allow remote attackers to induce Teredo clients to send packets to third parties.","status":"published","published":"2006-12-04T11:00:00Z","modified":"2024-08-07T20:19:35Z","updated_at":"2026-11-03T01:15:44.304484Z"}],"ghsa":[{"id":"GHSA-x63c-6qqq-h574","title":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity...","description":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity tests (aka ping tests) in response to packets from non-Teredo source addresses, which might allow remote attackers to induce Teredo clients to send packets to third parties.","status":"published","published":"2022-05-01T07:36:24Z","modified":"2023-01-31T05:02:38Z","updated_at":"2026-11-02T14:48:17.918767Z"}],"nvd":[{"id":"CVE-2006-6266","description":"Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity tests (aka ping tests) in response to packets from non-Teredo source addresses, which might allow remote attackers to induce Teredo clients to send packets to third parties.","status":"published","published":"2006-12-04T11:28:00Z","modified":"2026-06-16T22:32:48.657Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:01:08.546281Z"}]}}