The NetX Secure DTLS server sends a HelloVerifyRequest carrying a freshly generated cookie, but never checks the cookie a client returns. The ClientHello parser copies the client's cookie bytes over the value the server issued, and the server then decides whether the client has been verified from the cookie's length alone. A peer that puts any single cookie byte in its first ClientHello skips the verification exchange entirely, so the server has no return-routability check and completes handshakes for forged source addresses.
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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Sat, 17 Oct 2026 06:00:00 +0000

Type Values Removed Values Added
First Time appeared Eclipse
Eclipse netx Duo
Vendors & Products Eclipse
Eclipse netx Duo

Fri, 16 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Title NetX Duo DTLS Server Bypasses Cookie Validation, Enabling Forged Connections

Wed, 14 Oct 2026 18:00:00 +0000

Type Values Removed Values Added
Description The NetX Secure DTLS server sends a HelloVerifyRequest carrying a freshly generated cookie, but never checks the cookie a client returns. The ClientHello parser copies the client's cookie bytes over the value the server issued, and the server then decides whether the client has been verified from the cookie's length alone. A peer that puts any single cookie byte in its first ClientHello skips the verification exchange entirely, so the server has no return-routability check and completes handshakes for forged source addresses.
Weaknesses CWE-290
CWE-406
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-10-16T20:14:45.833Z

Reserved: 2026-10-06T16:53:50.280Z

Link: CVE-2026-106465

cve-icon Vulnrichment

Updated: 2026-10-16T20:14:40.728Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T18:17:25.093

Modified: 2026-10-16T21:17:18.130

Link: CVE-2026-106465

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T05:45:03Z

Weaknesses