---
id: CVE-2025-59452
title: >-
  The YoSmart YoLink API through 2025-10-02 uses an endpoint URL that is derived
  from a device's MAC address along with an MD5 hash of non-secret information,
  such as a key that begins with cf50.
summary: >-
  The YoSmart YoLink API through 2025-10-02 uses an endpoint URL that is derived
  from a device's MAC address along with an MD5 hash of non-secret information,
  such as a key that begins with cf50.
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-340
published: '2025-10-06'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:10:00.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-59452'
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: 0.00439
epssPercentile: 0.35802
ingestedAt: '2026-09-30T23:29:32.417Z'
---

## Overview

The YoSmart YoLink API through 2025-10-02 uses an endpoint URL that is derived from a device's MAC address along with an MD5 hash of non-secret information, such as a key that begins with cf50.

## Remediation

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