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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…
Medium5.0EPSS 2.0%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 2.0% · top 20% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (8)
- 20050822 RE: Cisco Clean Access Agent (Perfigo) bypass (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 19726 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20060829 Re: Cisco NAC Appliance Agent Installation Bypass Vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060822 Response to BugTraq - Cisco Clean Access Agent (Perfigo) Bypass (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- 20050819 Cisco Clean Access Agent (Perfigo) bypass (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060826 NAC Agent Installation Bypass (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- 20060826 Re: Cisco NAC Appliance Agent Installation Bypass Vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20060826 Cisco NAC Appliance Agent Installation Bypass Vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2006-4430)Record last updated .