In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, the NetX Secure DTLS server fills HelloVerifyRequest cookies from NX_RAND(), by default the C library rand(), with no key and no binding to the client. An attacker who can predict the generator's output can pass the cookie exchange from a spoofed address and make the server send its handshake flight to a victim, using it as a traffic reflector.
History

Wed, 04 Nov 2026 10:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-330

Wed, 04 Nov 2026 09:45:00 +0000

Type Values Removed Values Added
Description Predictable DTLS HelloVerifyRequest Cookie in NetX Secure In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, the NetX Secure DTLS server fills HelloVerifyRequest cookies from NX_RAND(), by default the C library rand(), with no key and no binding to the client. An attacker who can predict the generator's output can pass the cookie exchange from a spoofed address and make the server send its handshake flight to a victim, using it as a traffic reflector.
Title Predictable DTLS HelloVerifyRequest Cookie in NetX Secure NetX Secure DTLS server issues predictable HelloVerifyRequest cookies, so a spoofed client can pass the return-routability check
Weaknesses CWE-338
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L'}


Wed, 30 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Eclipse
Eclipse netxduo
Vendors & Products Eclipse
Eclipse netxduo

Tue, 29 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
Title Predictable DTLS HelloVerifyRequest Cookie in NetX Secure

Tue, 29 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 29 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
Description Predictable DTLS HelloVerifyRequest Cookie in NetX Secure
Weaknesses CWE-330
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published: 2026-09-29T17:45:21.609Z

Updated: 2026-11-04T09:36:15.185Z

Reserved: 2026-09-29T16:15:15.514Z

Link: CVE-2026-102719

cve-icon Vulnrichment

Updated: 2026-09-29T18:39:16.650Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T18:17:11.240

Modified: 2026-11-04T10:17:23.560

Link: CVE-2026-102719

cve-icon Redhat

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