{"id":"CVE-2026-123998","title":"Hisense VIDAA Smart TV MQTT Broker Authentication Bypass","summary":"Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an authentication bypass vulnerability in its remote-control MQTT broker on TCP port 36669, which accepts publicly documented default credentials and an ineffective 4-digit pair…","severity":"high","cvss":8.3,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","cvssSource":"cna","cwe":["CWE-1392","CWE-307"],"vendor":"Hisense","product":"VIDAA","affected":["VIDAA 0000.01.00a.P0220"],"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T18:59:56.705Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123998","references":[{"url":"https://github.com/yehia-mamdouh/Hisense-Smart-TV-Security-Research","label":"Researcher Disclosure"},{"url":"https://www.vulncheck.com/advisories/hisense-vidaa-smart-tv-mqtt-broker-authentication-bypass","label":"VulnCheck Advisory: Hisense VIDAA Smart TV MQTT Broker Authentication Bypass"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T20:03:04.294Z","epss":0.0023,"epssPercentile":0.1395,"slug":"CVE-2026-123998","body":"## Overview\n\nHisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an authentication bypass vulnerability in its remote-control MQTT broker on TCP port 36669, which accepts publicly documented default credentials and an ineffective 4-digit pairing PIN with no rate limiting or lockout, allowing a brute force of the entire code space in about five seconds, while some actions require no pairing at all. A LAN-adjacent attacker can exploit this to inject key events, change volume, switch input sources, enumerate inputs, launch arbitrary installed applications, and monitor pairing activity, posing a significant risk in hotel deployments where untrusted LAN access is common.\n\n## Affected\n\n- `VIDAA 0000.01.00a.P0220`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}