---
id: CVE-2025-59449
title: >-
  The YoSmart YoLink MQTT broker through 2025-10-02 does not enforce sufficient
  authorization controls to prevent cross-account attacks, allowing an attacker
  to remotely operate affected devices if the attacker obtains the associated
  devic…
summary: >-
  The YoSmart YoLink MQTT broker through 2025-10-02 does not enforce sufficient
  authorization controls to prevent cross-account attacks, allowing an attacker
  to remotely operate affected devices if the attacker obtains the associated
  devic…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-863
published: '2025-10-06'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T10:10:00.193'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-59449'
references:
  - url: 'https://bishopfox.com/blog/advisories'
    label: cve@mitre.org
  - url: >-
      https://bishopfox.com/blog/how-a-20-smart-device-gave-me-access-to-your-home
    label: cve@mitre.org
  - url: 'https://shop.yosmart.com/pages/product-support'
    label: cve@mitre.org
  - url: 'https://shop.yosmart.com/pages/sa-2025-001'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00281
epssPercentile: 0.18814
ingestedAt: '2026-10-09T12:53:28.926Z'
---

## Overview

The YoSmart YoLink MQTT broker through 2025-10-02 does not enforce sufficient authorization controls to prevent cross-account attacks, allowing an attacker to remotely operate affected devices if the attacker obtains the associated device IDs. Because YoLink device IDs are predictable, an attacker can exploit this to gain full control over any other YoLink user's devices.

## Remediation

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