CVE-2026-102719
NetX Secure DTLS server issues predictable HelloVerifyRequest cookies, so a spoofed client can pass the return-routability check
CVSS Score
0.0
EPSS Score
0.2%
EPSS Percentile
11th
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.
| CWE | CWE-338 |
| Vendor | eclipse foundation |
| Product | eclipse threadx netx duo |
| Published | Sep 29, 2026 |
| Last Updated | Nov 4, 2026 |
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Affected Versions
Eclipse Foundation / Eclipse ThreadX NetX Duo
6.0 ≤ 6.5.2.202603a
References
Credits
🔍 afldl Frédéric Desbiens