Cisco NX-OS allows local users to bypass intended TACACS+ command restrictions via a series of multiple commands, aka Bug ID CSCum47367.
https://exchange.xforce.ibmcloud.com/vulnerabilities/90627
http://www.securitytracker.com/id/1029690
http://www.securityfocus.com/bid/65083
http://tools.cisco.com/security/center/viewAlert.x?alertId=32531
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-0676