{"id":"CVE-2026-8618","title":"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 0x…","summary":"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 0x…","severity":"high","cvss":7.7,"cvssVector":"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","cwe":["CWE-121"],"vendor":"TP-Link Systems Inc.","product":"Deco M9 Plus V2","affected":["deco_m9_plus_v2 < 1.9.2 Build 20260818"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T20:36:38.330","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-8618","references":[{"url":"https://www.tp-link.com/en/support/download/deco-m9-plus/v2/#Firmware","label":"f23511db-6c3e-4e32-a477-6aa17d310630"},{"url":"https://www.tp-link.com/us/support/download/deco-m9-plus/v2/#Firmware","label":"f23511db-6c3e-4e32-a477-6aa17d310630"},{"url":"https://www.tp-link.com/us/support/faq/5322/","label":"f23511db-6c3e-4e32-a477-6aa17d310630"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-01T18:35:59.010450Z"},"cvssSource":"cna","ingestedAt":"2026-10-01T18:55:42.389Z","epss":0.00263,"epssPercentile":0.18063,"slug":"CVE-2026-8618","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}