{"id":"CVE-2015-6279","aliases":["EUVD-2015-6221","GHSA-f4v7-w5wp-p585"],"status":"published","title":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1...","description":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S allows remote attackers to cause a denial of service (device reload) via a malformed ND packet with the Cryptographically Generated Address (CGA) option, aka Bug ID CSCuo04400.","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":0.03219,"percentile":0.88304,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2015-09-28T01:00:00Z","modified":"2026-06-17T00:30:37Z","products":[{"vendor":"cisco","product":"ios"},{"vendor":"cisco","product":"ios_xe"}],"references":[{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150923-fhs/cvrf/cisco-sa-20150923-fhs_cvrf.xml","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150923-fhs","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id/1033647","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-6279"},{"url":"https://github.com/advisories/GHSA-f4v7-w5wp-p585"}],"sources":{"cve":[{"id":"CVE-2015-6279","description":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S allows remote attackers to cause a denial of service (device reload) via a malformed ND packet with the Cryptographically Generated Address (CGA) option, aka Bug ID CSCuo04400.","status":"published","published":"2015-09-28T01:00:00Z","modified":"2024-08-06T07:15:13.316Z","updated_at":"2026-11-02T14:35:42.984856Z"}],"euvd":[{"id":"EUVD-2015-6221","description":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S allows remote attackers to cause a denial of service (device reload) via a malformed ND packet with the Cryptographically Generated Address (CGA) option, aka Bug ID CSCuo04400.","status":"published","published":"2015-09-28T01:00:00Z","modified":"2024-08-06T07:15:13Z","updated_at":"2026-11-03T02:21:56.647378Z"}],"ghsa":[{"id":"GHSA-f4v7-w5wp-p585","title":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1...","description":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S allows remote attackers to cause a denial of service (device reload) via a malformed ND packet with the Cryptographically Generated Address (CGA) option, aka Bug ID CSCuo04400.","status":"published","published":"2022-05-17T03:21:46Z","modified":"2023-01-27T05:07:17Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:43:05.498698Z"}],"nvd":[{"id":"CVE-2015-6279","description":"The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S allows remote attackers to cause a denial of service (device reload) via a malformed ND packet with the Cryptographically Generated Address (CGA) option, aka Bug ID CSCuo04400.","status":"published","published":"2015-09-28T02:59:11.027Z","modified":"2026-06-17T00:30:37.91Z","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-20"],"updated_at":"2026-11-02T14:03:09.92183Z"}]}}