{"id":"CVE-2026-8618","revision":"1d132f53f4a54e35a9e36eb0efcf0e6d","records":[{"revision":"1d132f53f4a54e35a9e36eb0efcf0e6d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-8618","aliases":[],"title":"Pre-Authentication Stack-based Buffer Overflow Remote Code Execution in TDDPv2 Subtype 0x91 on Deco M9 Plus","description":"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.","state":0,"publishedAt":"2026-10-01T18:16:32.107+00:00","modifiedAt":"2026-10-01T18:36:18.919+00:00","affected":[{"ecosystem":"Vendor product","name":"Deco M9 Plus V2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TP-Link Systems Inc.\",\n                    \"product\": \"Deco M9 Plus V2\",\n                    \"modules\": [\n                        \"tddp\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.9.2 Build 20260818\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","score":7.7,"severity":"HIGH"}],"references":["https://www.tp-link.com/en/support/download/deco-m9-plus/v2/#Firmware","https://www.tp-link.com/us/support/download/deco-m9-plus/v2/#Firmware","https://www.tp-link.com/us/support/faq/5322/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-8618","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-8618","identifiers":["CVE-2026-8618"]},"retained":false,"historicalAffected":[]}],"coverage":[]}