How severe is CVE-2009-0059?

CVE-2009-0059 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-0059 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0059?

CVE-2009-0059 primarily affects Cisco 4400 Wireless Lan Controller. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0059?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-0059 published?

CVE-2009-0059 was published on 2009-02-05 and last updated on 2026-06-16.

CVE-2009-0059

CVE-2009-0059 is a high-severity vulnerability in Cisco 4400 Wireless Lan Controller with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco 4400 Wireless Lan Controller
Published: 2009-02-05
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2009-0059?: 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.
How severe is CVE-2009-0059?: CVE-2009-0059 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2009-0059 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0059?: CVE-2009-0059 primarily affects Cisco 4400 Wireless Lan Controller. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0059?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-0059 published?: CVE-2009-0059 was published on 2009-02-05 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:h:cisco:4400_wireless_lan_controller:4.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4400_wireless_lan_controller:4.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4400_wireless_lan_controller:5.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_3750_series_integrated_wireless_lan_controller:4.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_3750_series_integrated_wireless_lan_controller:4.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_3750_series_integrated_wireless_lan_controller:5.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_6500_series_integrated_wireless_lan_controller:4.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_6500_series_integrated_wireless_lan_controller:4.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_6500_series_integrated_wireless_lan_controller:5.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_7600_series_wireless_lan_controller:4.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_7600_series_wireless_lan_controller:4.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_7600_series_wireless_lan_controller:5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:4.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:5.2:*:*:*:*:*:*:*

More vulnerabilities in Cisco 4400 Wireless Lan Controller

CVE-2012-0371 — Critical (CVSS 9.3): Cisco Wireless LAN Controller (WLC) devices with software 4.x, 5.x, 6.0, and 7.0 before 7.0.220.4, when CPU-based ACLs…
CVE-2013-1104 — Critical (CVSS 9.0): The HTTP Profiling functionality on Cisco Wireless LAN Controller (WLC) devices with software 7.3.101.0 allows remote…
CVE-2013-1103 — High (CVSS 7.8): Cisco Wireless LAN Controller (WLC) devices with software 7.0 before 7.0.220.0, 7.1 before 7.1.91.0, and 7.2 before…
CVE-2013-1102 — High (CVSS 7.8): The Wireless Intrusion Prevention System (wIPS) component on Cisco Wireless LAN Controller (WLC) devices with software…
CVE-2012-0370 — High (CVSS 7.8): Cisco Wireless LAN Controller (WLC) devices with software 4.x, 5.x, 6.0, and 7.0 before 7.0.220.0 and 7.1 before…
CVE-2012-0369 — High (CVSS 7.8): Cisco Wireless LAN Controller (WLC) devices with software 6.0 and 7.0 before 7.0.220.0, 7.1 before 7.1.91.0, and 7.2…

All CVEs affecting Cisco 4400 Wireless Lan Controller →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →