The SNMP implementation in the Cisco Wireless LAN Controller (WLC) before 20070419 uses the default read-only community public, and the default read-write community private, which allows remote attackers to read and modify SNMP variables, aka Bug ID CSCse02384.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33604
http://www.vupen.com/english/advisories/2007/1368
http://www.securityfocus.com/bid/23461
http://www.cisco.com/warp/public/707/cisco-sa-20070412-wlc.shtml