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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N- EPSS score
- 2.0% (80th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2006-4418)
- Published
- August 29, 2006
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2006-4418 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / network admission control
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
- cisco / network admission control manager and server system software
References
- http://archive.cert.uni-stuttgart.de/archive/bugtraq/2005/08/msg00200.html
- http://www.cisco.com/en/US/products/ps6128/products_security_notice09186a00804fa82b.html
- http://www.cisco.com/en/US/products/ps6128/tsd_products_security_response09186a008071d609.html
- http://www.securityfocus.com/archive/1/408603/30/0/threaded
- http://www.securityfocus.com/archive/1/444424/100/0/threaded
- http://www.securityfocus.com/archive/1/444501/100/0/threaded
- http://www.securityfocus.com/archive/1/444737/100/0/threaded
- http://www.securityfocus.com/bid/19726
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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