---
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
---

## Overview

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.

## Affected

- `VIDAA 0000.01.00a.P0220`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.