Cisco NX-OS allows local users to gain privileges and execute arbitrary commands via shell metacharacters in a command that calls the system library function, aka Bug IDs CSCtf23559 and CSCtf27780.
https://exchange.xforce.ibmcloud.com/vulnerabilities/87678
http://www.securityfocus.com/bid/62848
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4076