{"id":"CVE-2026-92853","aliases":["EUVD-2026-105133","GHSA-893m-9g4r-4992"],"status":"published","title":"Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure","description":"The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.\n\n\n\nThe trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.","severity":{"version":"4.0","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:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00297,"percentile":0.22552,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125","CWE-191"],"published":"2026-10-20T15:10:08Z","modified":"2026-10-28T02:30:27Z","products":[{"vendor":"eclipse foundation","product":"eclipse threadx - netx duo"}],"references":[{"url":"https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-893m-9g4r-4992","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92853.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92853","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-92853","title":"Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure","description":"The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.\n\n\n\nThe trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.","status":"published","published":"2026-10-20T15:10:08.102Z","modified":"2026-10-20T17:02:19.98Z","cvss":[{"version":"4.0","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:N","level":"high","assessor":"cna"}],"cwes":["CWE-125","CWE-191"],"updated_at":"2026-11-02T13:48:24.536396Z"}],"euvd":[{"id":"EUVD-2026-105133","description":"The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.\n\n\n\nThe trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.","status":"published","published":"2026-10-20T15:10:08Z","modified":"2026-10-20T17:02:19Z","cvss":[{"version":"4.0","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:N","level":"high"}],"updated_at":"2026-11-02T16:59:43.600473Z"}],"nvd":[{"id":"CVE-2026-92853","description":"The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.\n\n\n\nThe trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.","status":"published","published":"2026-10-20T16:17:17.277Z","modified":"2026-10-20T19:48:50.25Z","cvss":[{"version":"4.0","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:N/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","level":"high","assessor":"secondary"}],"cwes":["CWE-125","CWE-191"],"updated_at":"2026-11-02T14:13:01.161484Z"}],"osv":[{"id":"CVE-2026-92853","title":"Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure","description":"The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.\n\n\n\nThe trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.","status":"published","published":"2026-10-20T15:10:08.102Z","modified":"2026-10-28T02:30:27.840704353Z","cvss":[{"version":"4.0","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:N","level":"high"}],"cwes":["CWE-125","CWE-191"],"updated_at":"2026-11-02T15:45:20.588039Z"}]}}