The CLI in Cisco IOS XR 6.x through 6.0.1 allows local users to execute arbitrary OS commands in a privileged context by leveraging unspecified container access, aka Bug ID CSCuz62721.
http://www.securitytracker.com/id/1036311
http://www.securityfocus.com/bid/91785
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160714-ios-xr