Teredo clients, when following item 6 of RFC4380 section 5.2.3, start direct IPv6…
Priority MEDIUM 44Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.12073 96th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-6266
- 2026-10-03 Alias added: GHSA-x63c-6qqq-h574
References
More Microsoft Teredo vulnerabilities
- TI-2006-06028 Teredo creates trusted peer entries for arbitrary incoming source Teredo addresses, even… CVSS 2.0HIGH 7.5
- TI-2006-06027 Teredo clients, when source routing is enabled, recognize a Routing header in an… CVSS 2.0MEDIUM 6.8
- TI-2006-06029 Teredo clients, when located behind a restricted NAT, allow remote attackers to establish… CVSS 2.0MEDIUM 5.8
Sources
- CVE-2006-6266 · CVE Program
- CVE-2006-6266 · NVD
- FIRST EPSS
- GHSA-x63c-6qqq-h574 · GitHub Advisory Database · CC BY 4.0
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