How severe is CVE-2007-4011?

CVE-2007-4011 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2007-4011 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-2007-4011?

CVE-2007-4011 primarily affects Cisco Wireless Lan Controller Software. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4011?

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-2007-4011 published?

CVE-2007-4011 was published on 2007-07-26 and last updated on 2026-06-16.

CVE-2007-4011

CVE-2007-4011 is a high-severity vulnerability in Cisco Wireless Lan Controller Software with a CVSS 2.0 base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Wireless Lan Controller Software
Published: 2007-07-26
Last modified: 2026-06-16

Description

Cisco 4100 and 4400, Airespace 4000, and Catalyst 6500 and 3750 Wireless LAN Controller (WLC) software before 3.2 20070727, 4.0 before 20070727, and 4.1 before 4.1.180.0 allows remote attackers to cause a denial of service (traffic amplification or ARP storm) via a crafted unicast ARP request that (1) has a destination MAC address unknown to the Layer-2 infrastructure, aka CSCsj69233; or (2) occurs during Layer-3 roaming across IP subnets, aka CSCsj70841.

Frequently asked questions

What is CVE-2007-4011?: Cisco 4100 and 4400, Airespace 4000, and Catalyst 6500 and 3750 Wireless LAN Controller (WLC) software before 3.2 20070727, 4.0 before 20070727, and 4.1 before 4.1.180.0 allows remote attackers to cause a denial of service (traffic amplification or ARP storm) via a crafted unicast ARP request that (1) has a destination MAC address unknown to the Layer-2 infrastructure, aka CSCsj69233; or (2) occurs during Layer-3 roaming across IP subnets, aka CSCsj70841.
How severe is CVE-2007-4011?: CVE-2007-4011 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2007-4011 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-2007-4011?: CVE-2007-4011 primarily affects Cisco Wireless Lan Controller Software. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4011?: 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-2007-4011 published?: CVE-2007-4011 was published on 2007-07-26 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:o:cisco:wireless_lan_controller_software:3.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:3.2.116.21:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:4.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:4.0.155.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:wireless_lan_controller_software:4.1:*:*:*:*:*:*:*

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