# Bloctel data breach in France

> Live situation record from CLSTR: https://clstr.news/situations/bloctel-data-breach-in-france
> Updated: 2026-08-12T10:40:01.000Z. Sources: 5. Developments: 2.

The French government service Bloctel, which is intended to prevent unsolicited telemarketing, experienced a cybersecurity incident involving the potential exposure of approximately 3 million telephone numbers.

Authorities reported that an unauthorized third party gained access by impersonating a professional user account to download files. The breach was facilitated by the lack of two-factor authentication on the compromised account. While Bloctel stated that names and other personal identifiers were not associated with the exposed numbers, officials warned that the leak increases the risk of phishing attempts, SMS messages, and unwanted calls. The incident has been reported to the Commission Nationale de l'Informatique et des Libertés (CNIL).

## Timeline

### 2026-08-12: Bloctel data breach exposes 3 million phone numbers

A data breach at France's Bloctel service has potentially exposed 3 million phone numbers via a compromised professional account, increasing risks of phishing and unsolicited calls.

2 sources. https://clstr.news/cluster/bloctel-data-breach-exposes-3-million-phone-numbers

### 2026-08-09: Bloctel data breach and utility theft in Senegal

A data breach at Bloctel has exposed 3 million phone numbers in France, while Senegalese police arrested two suspects for the theft of utility meters and cables in Dalifort.

3 sources. https://clstr.news/cluster/bloctel-data-breach-and-utility-theft-in-senegal

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Cite as: Bloctel data breach in France. CLSTR, https://clstr.news/situations/bloctel-data-breach-in-france