---
title: "Data breach at Aestria"
description: "On September 26, 2026, an actor posted a hacking claim on a cybercriminal forum targeting Aestria, a French IT services and cybersecurity company based in Metz. Ten internal databases (ERP management tools, technical support, websites) were reportedly exfiltrated after exploiting a flaw in the clien"
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-09-26-aestria
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-09-26
dateModified: 2026-09-26
---
# Aestria

Data breach — Moderate

On September 26, 2026, an actor posted a hacking claim on a cybercriminal forum targeting Aestria, a French IT services and cybersecurity company based in Metz. Ten internal databases (ERP management tools, technical support, websites) were reportedly exfiltrated after exploiting a flaw in the client extranet. The data reportedly includes names, email addresses, phone numbers, postal addresses, login credentials and hashed passwords, as well as information on clients, suppliers, orders and invoices. The number of affected people is unknown, and Aestria has not confirmed the incident at this stage.

The credentials and hashed passwords, combined with client and supplier contact details, could be used for targeted phishing attempts impersonating Aestria or its business partners.

| Fact | Value |
| --- | --- |
| Disclosed on | September 26, 2026 |
| Sector | Digital services |
| Country | France |
| Cause | Misconfigured database |
| Severity | Moderate |
| Status | Reported |

## Exposed data

- Email address
- Full name
- Phone number
- Postal address
- Customer ID
- Order history
- Connection data (IP, logs)
- Employment data
- Password (hashed)

## What you can do

- Change that password — and everywhere you reused it. That is how a leak spreads to your other accounts.
- Turn on two-factor authentication on the affected accounts: a stolen password is then no longer enough.
- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- 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

- [Aestria](https://frenchbreaches.com/alertes/aestria-mui0okz5kx91njjeuw) — FrenchBreaches
- [Aestria : fuite de données revendiquée après un piratage présumé](https://fuitesinfos.fr/article/2026-09-26-aestria) — FuitesInfos
- [Aestria : les données clients et outils internes d'un prestataire cyber en fuite](https://www.cyberattaque.org/aestria-les-donnees-clients-et-outils-internes-dun-prestataire-cyber-en-fuite/) — Cyberattaque.org
- [Une fuite d'accès IT français réapparaît sur un forum pirate](https://www.zataz.com/une-fuite-dacces-it-francais-reapparait-sur-un-forum-pirate/) — ZATAZ
- [Prestataire informatique piraté : ce que doivent décider clients et fournisseurs](https://kohenavocats.fr/2026/09/27/aestria-prestataire-pirate-clients-fournisseurs-decisions-2026/) — Kohen Avocats

_Entry built from the cited sources after a corroboration check, then reviewed before publication._

---

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