---
title: "Data breach at ADT"
description: "In April 2026, ADT suffered a data breach. 5.5 million accounts were affected. The exposed data includes dates of birth, email addresses, names, identity documents, phone numbers and postal addresses."
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-04-20-adt
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-04-27
dateModified: 2026-04-27
---
# ADT

Data breach — Critical

In April 2026, ADT suffered a data breach. 5.5 million accounts were affected. The exposed data includes dates of birth, email addresses, names, identity documents, phone numbers and postal addresses.

| Fact | Value |
| --- | --- |
| Disclosed on | April 27, 2026 |
| Incident dated | April 20, 2026 |
| Accounts affected | 5.5M |
| Sector | Digital services |
| Country | International or undetermined |
| Cause | Undisclosed |
| Severity | Critical |
| Status | Confirmed |

## Exposed data

- Date of birth
- Email address
- Full name
- Identity document
- Phone number
- Postal address

## What you can do

- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- These documents enable identity theft, and cannot be reissued at will. Keep the notification letter: it proves where the leak came from if an account is opened in your name.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Have I Been Pwned — ADT](https://haveibeenpwned.com/Breach/ADT) — Have I Been Pwned (CC BY 4.0)

_Entry built from Have I Been Pwned’s structured data, with no model rewriting._

---

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