{"schema":"threatline.record/2","record":{"id":"CVE-2026-93475","aliases":["GHSA-rcv5-vfff-25gh"],"summary":"Out-of-bounds Write via an Unbounded RSA Modulus in NetX Secure X.509","details":"The X.509 parser in NetX Secure accepts an RSA public key of any size, but every signature-verification path decrypts into fixed-size buffers dimensioned for the `NX_CRYPTO_MAX_RSA_MODULUS_SIZE` default of 4096 bits. A certificate carrying a larger modulus drives an out-of-bounds write past a file-scope static during ordinary certificate-chain verification.\n\n\n\nIt is reachable pre-authentication. The issuer used for the crypto operation is looked up in the remote, peer-supplied store before the trusted store, so the attacker supplies the oversized key themselves as an intermediate in the chain they present. It triggers on a TLS or DTLS client verifying a malicious server's chain, and on a server performing client-certificate authentication.","categories":["Unclassified"],"product":"Eclipse ThreadX - NetX Duo","vendor":"Eclipse Foundation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93475","source_modified_at":"2026-10-20T17:02:52.372Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Eclipse ThreadX - NetX Duo","vendor":"Eclipse Foundation","versions":[{"status":"affected","version":"0","lessThanOrEqual":"6.5.1.202602","versionType":"semver"},{"status":"unaffected","version":"6.5.2.202603"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":9.3,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00246,"percentile":0.1496,"score_date":"2026-10-23"},"published_at":"2026-10-20T15:04:30.044Z","modified_at":"2026-10-20T17:02:52.372Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93475","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T17:02:52.372Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93475","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-rcv5-vfff-25gh"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"total","assessed_at":"2026-10-20T17:02:43.642743Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-20T17:02:52.372Z","content_hash":"187dcbf9e22a7c5a5899a6590935c33c5a739d841364fa390a4f23d6a2bf37fd"}}