Is CVE-2006-6266 being actively exploited?

CVE-2006-6266 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2006-6266?

CVE-2006-6266 has a CVSS 2.0 base score of 6.8 (MEDIUM).

CVE-2006-6266

MEDIUM · CVSS 6.8EPSS 12.1%EU EUVD

Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6 connectivity tests (aka ping tests) in response to packets from non-Teredo source addresses, which might allow remote attackers to induce Teredo clients to send packets to third parties.

Key facts

CVSS score: 6.8 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
EPSS score: 12.1% (96th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2006-6249)
Published: December 4, 2006
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2006-6249 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / teredo

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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