{"id":"CVE-2010-4671","aliases":["EUVD-2010-4636","GHSA-qcfh-5wrf-w2jc"],"status":"published","title":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1...","description":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1)XA5 allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, as demonstrated by the flood_router6 program in the thc-ipv6 package, aka Bug ID CSCti33534.","severity":{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03618,"percentile":0.89584,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2011-01-07T11:00:00Z","modified":"2026-06-16T23:25:17Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://www.securityfocus.com/bid/45760","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/64589","tags":["vdb-entry","x_refsource_XF","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://mirror.fem-net.de/CCC/27C3/mp4-h264-HQ/27c3-3957-en-ipv6_insecurities.mp4","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://www.ciscosystems.com/en/US/docs/ios/15_0/15_0x/15_01_XA/rn800xa.pdf","tags":["x_refsource_CONFIRM","x_transferred","Broken Link"]},{"url":"http://mirror.fem-net.de/CCC/27C3/mp3-audio-only/27c3-3957-en-ipv6_insecurities.mp3","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://events.ccc.de/congress/2010/Fahrplan/events/3957.en.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://www.youtube.com/watch?v=00yjWB6gGy8","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-4671"},{"url":"https://github.com/advisories/GHSA-qcfh-5wrf-w2jc"}],"sources":{"cve":[{"id":"CVE-2010-4671","description":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1)XA5 allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, as demonstrated by the flood_router6 program in the thc-ipv6 package, aka Bug ID CSCti33534.","status":"published","published":"2011-01-07T11:00:00Z","modified":"2024-08-07T03:51:18.052Z","updated_at":"2026-11-02T14:33:28.858903Z"}],"euvd":[{"id":"EUVD-2010-4636","description":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1)XA5 allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, as demonstrated by the flood_router6 program in the thc-ipv6 package, aka Bug ID CSCti33534.","status":"published","published":"2011-01-07T11:00:00Z","modified":"2024-08-07T03:51:18Z","updated_at":"2026-11-03T01:39:29.508356Z"}],"ghsa":[{"id":"GHSA-qcfh-5wrf-w2jc","title":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1...","description":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1)XA5 allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, as demonstrated by the flood_router6 program in the thc-ipv6 package, aka Bug ID CSCti33534.","status":"published","published":"2022-05-13T01:26:50Z","modified":"2023-02-01T05:07:34Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:50:33.974767Z"}],"nvd":[{"id":"CVE-2010-4671","description":"The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS before 15.0(1)XA5 allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, as demonstrated by the flood_router6 program in the thc-ipv6 package, aka Bug ID CSCti33534.","status":"published","published":"2011-01-07T12:00:49.813Z","modified":"2026-06-16T23:25:17.283Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:02:03.297831Z"}]}}