The Cisco Wireless LAN Controller (WLC), Cisco Catalyst 6500 Wireless Services Module (WiSM), and Cisco Catalyst 3750 Integrated Wireless LAN Controller with software 4.x before 18.104.22.168 and 5.x before 5.2 allow remote attackers to cause a denial of service (web authentication outage or device reload) via unspecified network traffic, as demonstrated by a vulnerability scanner.
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20090204 Multiple Vulnerabilities in Cisco Wireless LAN Controllers