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CVE-2006-3551
NCP Secure Enterprise Client (aka VPN/PKI client) 8.30 Build 59, and possibly earlier versions, when the Link Firewall and Personal…
Low1.2EPSS 0.27%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
NCP Secure Enterprise Client (aka VPN/PKI client) 8.30 Build 59, and possibly earlier versions, when the Link Firewall and Personal Firewall are both configured to block all inbound and outbound network traffic, allows context-dependent attackers to send inbound UDP traffic with source port 67 and destination port 68, and outbound UDP traffic with source port 68 and destination port 67.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Low1.2 | AV:L/AC:H/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 1.2.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (2)
- ncp-vpnpki-udp-bypass-security(27484) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20060630 NCP VPN/PKI Client: UDP Bypassing (opens in a new tab)mailing-listx_refsource_FULLDISCx_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-2006-3551)Record last updated .