Cisco Wireless LAN Controller (WLC) devices before 8.0.140.0, 8.1.x and 8.2.x before 8.2.121.0, and 8.3.x before 8.3.102.0 allow remote attackers to cause a denial of service (device reload) by sending crafted Inter-Access Point Protocol (IAPP) packets and then sending a traffic stream metrics (TSM) information request over SNMP, aka Bug ID CSCuz40221.
http://www.securitytracker.com/id/1036721
http://www.securityfocus.com/bid/92712
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160831-wlc-1