BreachPublished 9 Jun 2026

French govt messaging service breached in account hijacking attack

Source Bleeping Computer

Description

DINUM, the digital affairs directorate of the French government, warned that hackers used a hijacked user account to breach Tchap, the French government's encrypted messaging platform. [...]

Impact

The breach exposed a large volume of user data including messages, files, email addresses, organizational information, meeting links, and device metadata. Sensitive information shared in private chats may have been accessed. Public chat rooms are not encrypted and accessible to any user, potentially increasing exposure of non-sensitive data. The incident risks privacy violations and potential misuse of exposed data. The breach also undermines trust in the government’s secure communication platform.

Defensive guidance

The compromised account has been blocked to remove attacker access. Users were notified to avoid sharing personal, sensitive, or confidential information in public chat rooms, which are not encrypted. Organizations using Tchap should review user account security and consider additional authentication controls to prevent social engineering attacks.

References

bleepingcomputer.com/news/security/french-govt-messaging-service-breached-in-account-hijacking-attack/ (opens in a new tab)

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Description

AI analysisMachine-generated, updated 9 Jun 2026, 10:55 UTC

References

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