CVE-2009-0059: Cisco 4400 Wireless Lan Controller

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

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 4.2.176.0 and 5.2.x before 5.2.157.0 allow remote attackers to cause a denial of service (device reload) via a web authentication (aka WebAuth) session that includes a malformed POST request to login.html.

Affected products

• Cisco 4400 Wireless Lan Controller: version 4.1 only; version 4.2 only; version 5.2 only
• Cisco Catalyst 3750 Series Integrated Wireless Lan Controller: version 4.1 only; version 4.2 only; version 5.2 only
• Cisco Catalyst 6500 Series Integrated Wireless Lan Controller: version 4.1 only; version 4.2 only; version 5.2 only
• Cisco Catalyst 7600 Series Wireless Lan Controller: version 4.1 only; version 4.2 only; version 5.2 only
• Cisco Wireless Lan Controller Software: version 4.1 only; version 4.2 only; version 5.2 only

Published 2009-02-05. Last modified 2026-06-16.