{"affected":[{"defaultStatus":"unaffected","product":"Eclipse ThreadX NetX Duo","source":"CNA: eclipse","vendor":"Eclipse Foundation","versions":[{"lessThanOrEqual":"6.5.2.202603a","status":"affected","version":"6.0","versionType":"custom"},{"status":"unaffected","version":"6.5.2.202603b","versionType":"custom"}]}],"cveId":"CVE-2026-102719","cwes":["CWE-338"],"description":"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.","epss":{"date":"2026-11-03","percentile":0.10888,"score":0.00207},"exploits":[],"kev":null,"metrics":[{"score":6.3,"severity":"medium","source":"CNA: eclipse","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","version":"4.0"},{"score":6.3,"severity":"medium","source":"NVD: emo@eclipse.org","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"}],"modifiedAt":1793787443560,"publishedAt":1790703921609,"references":[{"source":"CNA: eclipse","tags":[],"url":"https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-j6gx-3j6v-3hm4"},{"source":"emo@eclipse.org","tags":[],"url":"https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-j6gx-3j6v-3hm4"}],"remediation":[],"revision":"cf35395b18ad52c641f225f551ac61871ae2eb5b47a9cea9e3034e5b533c95ff","sources":[{"modifiedAt":1793784975185,"name":"CNA: eclipse","retrievedAt":1793786899944,"url":"https://www.cve.org/CVERecord?id=CVE-2026-102719"},{"modifiedAt":1793787443560,"name":"NVD","retrievedAt":1793794546960,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102719"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793786946905,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-102719"}],"ssvc":{"assessedAt":1790707144305,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"NetX Secure DTLS server issues predictable HelloVerifyRequest cookies, so a spoofed client can pass the return-routability check","updatedAt":1793794546960}