The Web Administrator Interface on Cisco Wireless LAN Controller (WLC) devices allows remote authenticated users to cause a denial of service (device crash) by leveraging membership in the Full Manager managers group Read Only managers group or Lobby Ambassador managers group and sending a request that (1) lacks a parameter value or (2) contains a malformed parameter value aka Bug IDs CSCuh14313 CSCuh14159 CSCuh14368 and CSCuh14436.