Cisco 4100 and 4400, Airespace 4000, and Catalyst 6500 and 3750 Wireless LAN Controller (WLC) software 4.1 before 4.1.180.0 allows remote attackers to cause a denial of service (ARP storm) via a broadcast ARP packet that "targets the IP address of a known client context", aka CSCsj50374.
Conclusion & alert: CVE-2007-4012 is rated Moderate Risk (54.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.68%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.33% | 1.68% | +0.36% |
| 2 | 2026-05-06 | 1.07% | 1.33% | +0.25% |
| 3 | 2026-03-14 | — | 1.07% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.1 | 2.0 | HIGH |
|
8.6 | 6.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cisco | wireless_lan_controller_software | 3.2 | cpe:2.3:o:cisco:wireless_lan_controller_software:3.2:*:*:*:*:*:*:* |
| cisco | wireless_lan_controller_software | 3.2.116.21 | cpe:2.3:o:cisco:wireless_lan_controller_software:3.2.116.21:*:*:*:*:*:*:* |
| cisco | wireless_lan_controller_software | 4.0 | cpe:2.3:o:cisco:wireless_lan_controller_software:4.0:*:*:*:*:*:*:* |
| cisco | wireless_lan_controller_software | 4.0.155.0 | cpe:2.3:o:cisco:wireless_lan_controller_software:4.0.155.0:*:*:*:*:*:*:* |
| cisco | wireless_lan_controller_software | 4.1 | cpe:2.3:o:cisco:wireless_lan_controller_software:4.1:*:*:*:*:*:*:* |