Read the docs
TI-2006-04278 Aliases CVE-2006-4430GHSA-xhqj-9p6p-qgxw

The Cisco Network Admission Control (NAC) 3.6.4.1 and earlier allows remote attackers to…

Priority LOW 27Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Partial · None
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01952 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 26

CPEVersionsRoleVendor
cpe:2.3:a:cisco:network_admission_control:*:*:*:*:*:*:*:*up to 3.6.4.1VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3:*:*:*:*:*:*:*3.3VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.1:*:*:*:*:*:*:*3.3.1VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.2:*:*:*:*:*:*:*3.3.2VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.3:*:*:*:*:*:*:*3.3.3VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.4:*:*:*:*:*:*:*3.3.4VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.5:*:*:*:*:*:*:*3.3.5VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.6:*:*:*:*:*:*:*3.3.6VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.7:*:*:*:*:*:*:*3.3.7VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.8:*:*:*:*:*:*:*3.3.8VulnerableCisco
  • cpe:2.3:a:cisco:network_admission_control:*:*:*:*:*:*:*:* Versions up to 3.6.4.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.1:*:*:*:*:*:*:* Versions 3.3.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.2:*:*:*:*:*:*:* Versions 3.3.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.3:*:*:*:*:*:*:* Versions 3.3.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.4:*:*:*:*:*:*:* Versions 3.3.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.5:*:*:*:*:*:*:* Versions 3.3.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.6:*:*:*:*:*:*:* Versions 3.3.6 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.7:*:*:*:*:*:*:* Versions 3.3.7 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.8:*:*:*:*:*:*:* Versions 3.3.8 Vulnerable ·Cisco
Show 16 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.9:*:*:*:*:*:*:*3.3.9VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4:*:*:*:*:*:*:*3.4VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.1:*:*:*:*:*:*:*3.4.1VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.2:*:*:*:*:*:*:*3.4.2VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.3:*:*:*:*:*:*:*3.4.3VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.4:*:*:*:*:*:*:*3.4.4VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.5:*:*:*:*:*:*:*3.4.5VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5:*:*:*:*:*:*:*3.5VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5\(9\):*:*:*:*:*:*:*3.5(9)VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.1:*:*:*:*:*:*:*3.5.1VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.2:*:*:*:*:*:*:*3.5.2VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.3:*:*:*:*:*:*:*3.5.3VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.4:*:*:*:*:*:*:*3.5.4VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.5:*:*:*:*:*:*:*3.5.5VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.6.0.1:*:*:*:*:*:*:*3.6.0.1VulnerableCisco
cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.6.4.0.1:*:*:*:*:*:*:*3.6.4.0.1VulnerableCisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.3.9:*:*:*:*:*:*:* Versions 3.3.9 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.1:*:*:*:*:*:*:* Versions 3.4.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.2:*:*:*:*:*:*:* Versions 3.4.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.3:*:*:*:*:*:*:* Versions 3.4.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.4:*:*:*:*:*:*:* Versions 3.4.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.4.5:*:*:*:*:*:*:* Versions 3.4.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5\(9\):*:*:*:*:*:*:* Versions 3.5(9) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.1:*:*:*:*:*:*:* Versions 3.5.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.2:*:*:*:*:*:*:* Versions 3.5.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.3:*:*:*:*:*:*:* Versions 3.5.3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.4:*:*:*:*:*:*:* Versions 3.5.4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.5.5:*:*:*:*:*:*:* Versions 3.5.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.6.0.1:*:*:*:*:*:*:* Versions 3.6.0.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:network_admission_control_manager_and_server_system_software:3.6.4.0.1:*:*:*:*:*:*:* Versions 3.6.4.0.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2006-4430
  2. 2026-10-03 Alias added: GHSA-xhqj-9p6p-qgxw

References

Advisory 2

Other 1

  • TI-2008-01107 Cisco Network Admission Control (NAC) Appliance 3.5.x, 3.6.x before 3.6.4.4, 4.0.x before… CVSS 2.0HIGH 10.0
  • TI-2013-00973 The Cisco Network Admission Control (NAC) agent on Mac OS X does not verify the X.509… CVSS 2.0MEDIUM 5.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences