The DHCPv6 server module in Cisco CNS Network Registrar 7.1 allows remote attackers to cause a denial of service (daemon reload) via a malformed DHCPv6 packet, aka Bug ID CSCuo07437.
http://tools.cisco.com/security/center/viewAlert.x?alertId=33850
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2155