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Vulnerability record · CVE-2009-0059 · published 5 February 2009

CVE-2009-0059: Cisco 4400 wireless lan controller improper input validation vulnerability

Cisco · 4400 Wireless Lan Controller

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.

7.8 CVSS 2.0 High EPSS 1.9% · top 20.8% CWE-20 · Improper input validation
7.8CVSS 2.0 base score
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/33749
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a6c1dd.shtml Vendor Advisory
http://www.securityfocus.com/bid/33608
http://www.securitytracker.com/id?1021679
http://secunia.com/advisories/33749
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a6c1dd.shtml Vendor Advisory
http://www.securityfocus.com/bid/33608
http://www.securitytracker.com/id?1021679

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-0059), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.