---
id: CVE-2026-121816
title: About Time Technologies｜Herowatch Mini - Missing Authentication
summary: >-
  Herowatch Mini developed by About Time Technologies has a Missing
  Authentication vulnerability. Unauthenticated remote attackers can connect to
  the affected device's ADB service and obtain an ADB shell, thereby accessing
  device resources…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-306
vendor: About Time Technologies
product: Herowatch Mini
affected:
  - herowatch_mini all
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-04T18:28:36.805269Z'
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T20:00:58.877Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121816'
references:
  - url: 'https://www.twcert.org.tw/tw/cp-132-11355-341da-1.html'
  - url: 'https://www.twcert.org.tw/en/cp-139-11356-8292a-2.html'
tags:
  - cve.org
epss: 0.00354
epssPercentile: 0.29279
ingestedAt: '2026-11-05T21:36:00.526Z'
---

## Overview

Herowatch Mini developed by About Time Technologies has a Missing Authentication vulnerability. Unauthenticated remote attackers can connect to the affected device's ADB service and obtain an ADB shell, thereby accessing device resources or performing related operations.

## Affected

- `herowatch_mini all`

## Remediation

The product is no longer maintained. Users are advised to replace it with a supported device.