How severe is CVE-2009-0061?

CVE-2009-0061 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-0061 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0061?

CVE-2009-0061 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-2009-0061?

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-2009-0061 published?

CVE-2009-0061 was published on 2009-02-05 and last updated on 2026-06-16.

CVE-2009-0061

CVE-2009-0061 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% (73rd 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

Unspecified vulnerability in the Wireless LAN Controller (WLC) TSEC driver in the Cisco 4400 WLC, Cisco Catalyst 6500 and 7600 Wireless Services Module (WiSM), and Cisco Catalyst 3750 Integrated Wireless LAN Controller with software 4.x before 4.2.176.0 and 5.x before 5.1 allows remote attackers to cause a denial of service (device crash or hang) via unknown IP packets.

Frequently asked questions

What is CVE-2009-0061?: Unspecified vulnerability in the Wireless LAN Controller (WLC) TSEC driver in the Cisco 4400 WLC, Cisco Catalyst 6500 and 7600 Wireless Services Module (WiSM), and Cisco Catalyst 3750 Integrated Wireless LAN Controller with software 4.x before 4.2.176.0 and 5.x before 5.1 allows remote attackers to cause a denial of service (device crash or hang) via unknown IP packets.
How severe is CVE-2009-0061?: CVE-2009-0061 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2009-0061 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0061?: CVE-2009-0061 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-2009-0061?: 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-2009-0061 published?: CVE-2009-0061 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:5.0:*:*:*:*:*:*:*
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:5.0:*:*:*:*:*:*:*
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:5.0:*:*:*:*:*:*:*
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:5.0:*:*:*:*:*:*:*
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:5.0:*:*:*:*:*:*:*

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