{"id":"CVE-2011-2395","aliases":["EUVD-2011-2384","GHSA-mg4g-9536-v7mv"],"status":"published","title":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows...","description":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows remote attackers to bypass the Router Advertisement Guarding functionality via a fragmented IPv6 packet in which the Router Advertisement (RA) message is contained in the second fragment, as demonstrated by (1) a packet in which the first fragment contains a long Destination Options extension header or (2) a packet in which the first fragment contains an ICMPv6 Echo Request message.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0229,"percentile":0.83337,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-16"],"published":"2011-06-07T19:00:00Z","modified":"2026-06-16T23:31:15Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://seclists.org/fulldisclosure/2011/May/446","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"http://securityreason.com/securityalert/8271","tags":["third-party-advisory","x_refsource_SREASON","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/67940","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2395"},{"url":"https://github.com/advisories/GHSA-mg4g-9536-v7mv"}],"sources":{"cve":[{"id":"CVE-2011-2395","description":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows remote attackers to bypass the Router Advertisement Guarding functionality via a fragmented IPv6 packet in which the Router Advertisement (RA) message is contained in the second fragment, as demonstrated by (1) a packet in which the first fragment contains a long Destination Options extension header or (2) a packet in which the first fragment contains an ICMPv6 Echo Request message.","status":"published","published":"2011-06-07T19:00:00Z","modified":"2024-08-06T23:00:33.807Z","updated_at":"2026-11-02T14:35:36.968002Z"}],"euvd":[{"id":"EUVD-2011-2384","description":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows remote attackers to bypass the Router Advertisement Guarding functionality via a fragmented IPv6 packet in which the Router Advertisement (RA) message is contained in the second fragment, as demonstrated by (1) a packet in which the first fragment contains a long Destination Options extension header or (2) a packet in which the first fragment contains an ICMPv6 Echo Request message.","status":"published","published":"2011-06-07T19:00:00Z","modified":"2024-08-06T23:00:33Z","updated_at":"2026-11-03T01:39:55.659728Z"}],"ghsa":[{"id":"GHSA-mg4g-9536-v7mv","title":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows...","description":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows remote attackers to bypass the Router Advertisement Guarding functionality via a fragmented IPv6 packet in which the Router Advertisement (RA) message is contained in the second fragment, as demonstrated by (1) a packet in which the first fragment contains a long Destination Options extension header or (2) a packet in which the first fragment contains an ICMPv6 Echo Request message.","status":"published","published":"2022-05-17T01:55:23Z","modified":"2023-02-03T05:06:11Z","updated_at":"2026-11-02T14:53:51.728884Z"}],"nvd":[{"id":"CVE-2011-2395","description":"The Neighbor Discovery (ND) protocol implementation in Cisco IOS on unspecified switches allows remote attackers to bypass the Router Advertisement Guarding functionality via a fragmented IPv6 packet in which the Router Advertisement (RA) message is contained in the second fragment, as demonstrated by (1) a packet in which the first fragment contains a long Destination Options extension header or (2) a packet in which the first fragment contains an ICMPv6 Echo Request message.","status":"published","published":"2011-06-09T02:38:41.79Z","modified":"2026-06-16T23:31:15.003Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-16"],"updated_at":"2026-11-02T14:02:08.47516Z"}]}}