{"schema":"threatline.record/2","record":{"id":"CVE-2026-8618","aliases":[],"summary":"Pre-Authentication Stack-based Buffer Overflow Remote Code Execution in TDDPv2 Subtype 0x91 on Deco M9 Plus","details":"A stack-based buffer overflow vulnerability exists in the TDDPv2 service (/usr/bin/tddp) on Deco M9 Plus due to insufficient validation of decrypted request data length before it is copied into a fixed-size stack buffer in the subtype 0x91 handler. Successful exploitation may allow an adjacent, unauthenticated attacker to cause a denial of service or achieve arbitrary code execution during the device setup phase through crafted TDDP packets.","categories":["Network & edge"],"product":"Deco M9 Plus V2","vendor":"TP-Link Systems Inc.","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-8618","source_modified_at":"2026-10-01T18:36:18.919Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Deco M9 Plus V2","vendor":"TP-Link Systems Inc.","versions":[{"status":"affected","version":"0","lessThan":"1.9.2 Build 20260818","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-8618","source_modified_at":"2026-10-01T18:36:18.919Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Deco M9 Plus V2","ecosystem":null},"version":"1.9.2 Build 20260818","basis":"first unaffected version stated in the CVE record"}],"cvss":7.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00231,"percentile":0.13221,"score_date":"2026-10-23"},"published_at":"2026-10-01T18:16:32.107Z","modified_at":"2026-10-01T18:36:18.919Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-8618","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-01T18:36:18.919Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-8618","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.tp-link.com/en/support/download/deco-m9-plus/v2/#Firmware","tags":["patch"]},{"source":"CVE List","url":"https://www.tp-link.com/us/support/download/deco-m9-plus/v2/#Firmware","tags":["patch"]},{"source":"CVE List","url":"https://www.tp-link.com/us/support/faq/5322/","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-01T18:35:59.010450Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-01T18:36:18.919Z","content_hash":"116ecd37dcbd368e98d16a1adb4a2371a9cb30211fa11d69ed496cd2b0efea5b"}}