The TACACS+ command-authorization implementation in Cisco NX-OS allows local users to cause a denial of service (device reload) via a long CLI command, aka Bug ID CSCur54182.
http://www.securitytracker.com/id/1031685
http://www.securityfocus.com/bid/72393
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-8013