Cisco Wireless LAN Controller (WLC) devices 7.4(121.0) and 8.0(0.30220.385) allow remote attackers to cause a denial of service via crafted wireless management frames, aka Bug ID CSCun92979.
http://www.securitytracker.com/id/1036468
http://www.securityfocus.com/bid/92158
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160727-wlc