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Tchap hit by cyberattack

Incident
First reported
Last updated
Happening score
H score 19
1 unique sources, 1 articles

Summary

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A compromised user account enabled an unauthorized breach of Tchap, putting the French government's encrypted messaging platform at risk of exposing conversations and personal data. The incident was detected by ANSSI and disclosed by DINUM on Monday, with investigation still underway.

Timeline

  1. 09.06.2026 03:00 1 articles · 13h ago

    ANSSI detects a breach of Tchap via a compromised account

    Detection Ioc Update

    ANSSI detected a breach of Tchap on Sunday after a compromised user account was used to access the French government's encrypted messaging platform, indicating unauthorized access to a service designed for the French public sector.

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  2. 09.06.2026 03:00 2 articles · 13h ago

    DINUM alerts CNIL and Tchap users after the breach

    Initial Disclosure

    DINUM disclosed the Tchap breach on Monday, alerted France's CNIL, and notified Tchap users while investigators reviewed logs to determine which conversations the attacker could access and whether personal data was exposed; users were also reminded that public chat rooms are not encrypted and should not contain sensitive information.

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