{"id":"CVE-2026-123998","aliases":["EUVD-2026-118428","GHSA-hjch-8qgq-882h"],"status":"published","title":"Hisense VIDAA Smart TV MQTT Broker Authentication Bypass","description":"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 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.","severity":{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0023,"percentile":0.14008,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1392","CWE-307"],"published":"2026-11-06T18:59:56Z","modified":"2026-11-06T21:31:32Z","products":[{"vendor":"hisense","product":"vidaa"}],"references":[{"url":"https://github.com/yehia-mamdouh/Hisense-Smart-TV-Security-Research","tags":["technical-description","exploit"]},{"url":"https://www.vulncheck.com/advisories/hisense-vidaa-smart-tv-mqtt-broker-authentication-bypass","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123998"},{"url":"https://github.com/advisories/GHSA-hjch-8qgq-882h"}],"sources":{"cve":[{"id":"CVE-2026-123998","title":"Hisense VIDAA Smart TV MQTT Broker Authentication Bypass","description":"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 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.","status":"published","published":"2026-11-06T18:59:56.705Z","modified":"2026-11-09T13:15:39.812Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1392","CWE-307"],"updated_at":"2026-11-09T14:33:34.013968Z"}],"euvd":[{"id":"EUVD-2026-118428","description":"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 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.","status":"published","published":"2026-11-06T18:59:56Z","modified":"2026-11-09T13:15:39Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-07T00:07:45.548486Z"}],"ghsa":[{"id":"GHSA-hjch-8qgq-882h","title":"Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an authentication bypass...","description":"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 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.","status":"published","published":"2026-11-06T21:31:27Z","modified":"2026-11-06T21:31:32Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/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"},{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"high"}],"cwes":["CWE-307"],"updated_at":"2026-11-06T21:34:15.587491Z"}],"nvd":[{"id":"CVE-2026-123998","description":"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 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.","status":"published","published":"2026-11-06T19:17:45.427Z","modified":"2026-11-12T21:30:23.87Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/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"},{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-307","CWE-1392"],"updated_at":"2026-11-09T16:14:55.273195Z"}]}}