Vulnerability Database

313,551

Total vulnerabilities in the database

CVE-2006-4430

The Cisco Network Admission Control (NAC) 3.6.4.1 and earlier allows remote attackers to prevent installation of the Cisco Clean Access (CCA) Agent and bypass local and remote protection mechanisms by modifying (1) the HTTP User-Agent header or (2) the behavior of the TCP/IP stack. NOTE: the vendor has disputed the severity of this issue, stating that users cannot bypass authentication mechanisms.

  • Published: Aug 29, 2006
  • Updated: Nov 9, 2025
  • CVE: CVE-2006-4430
  • Severity: Medium
  • Exploit:

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:P/A:N

No CWE or OWASP classifications available.

Software From Fixed in
cisco / network_admission_control - 3.6.4.1.x
cisco / network_admission_control_manager_and_server_system_software 3.4.1 3.4.1.x
cisco / network_admission_control_manager_and_server_system_software 3.4.2 3.4.2.x
cisco / network_admission_control_manager_and_server_system_software 3.4.3 3.4.3.x
cisco / network_admission_control_manager_and_server_system_software 3.4.4 3.4.4.x
cisco / network_admission_control_manager_and_server_system_software 3.3.2 3.3.2.x
cisco / network_admission_control_manager_and_server_system_software 3.3.3 3.3.3.x
cisco / network_admission_control_manager_and_server_system_software 3.3.4 3.3.4.x
cisco / network_admission_control_manager_and_server_system_software 3.3.5 3.3.5.x
cisco / network_admission_control_manager_and_server_system_software 3.3.6 3.3.6.x
cisco / network_admission_control_manager_and_server_system_software 3.5.2 3.5.2.x
cisco / network_admission_control_manager_and_server_system_software 3.5.3 3.5.3.x
cisco / network_admission_control_manager_and_server_system_software 3.5.4 3.5.4.x
cisco / network_admission_control_manager_and_server_system_software 3.5.5 3.5.5.x
cisco / network_admission_control_manager_and_server_system_software 3.3 3.3.x
cisco / network_admission_control_manager_and_server_system_software 3.3.7 3.3.7.x
cisco / network_admission_control_manager_and_server_system_software 3.3.9 3.3.9.x
cisco / network_admission_control_manager_and_server_system_software 3.5 3.5.x
cisco / network_admission_control_manager_and_server_system_software 3.5.1 3.5.1.x
cisco / network_admission_control_manager_and_server_system_software 3.6.0.1 3.6.0.1.x
cisco / network_admission_control_manager_and_server_system_software 3.3.1 3.3.1.x
cisco / network_admission_control_manager_and_server_system_software 3.3.8 3.3.8.x
cisco / network_admission_control_manager_and_server_system_software 3.4 3.4.x
cisco / network_admission_control_manager_and_server_system_software 3.4.5 3.4.5.x
cisco / network_admission_control_manager_and_server_system_software 3.5(9) 3.5(9).x
cisco / network_admission_control_manager_and_server_system_software 3.6.4.0.1 3.6.4.0.1.x