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Signal clone used by federal agencies hit in attacks targeting major flaws - CISA says patch immediately


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  • Hackers are actively targeting a messaging app used by federal agencies
  • The app was also involved in the Signalgate scandal
  • Hackers have already stolen chats and metadata from 60 government officials

The US Cybersecurity and Infrastructure Security Agency (CISA) has warned a popular Signal messaging app clone being used by federal agencies is under attack.

The clone, TeleMessage, was found to have some serious issues, including a lack of proper end-to-end encryption.

Hackers have been exploiting two flaws, CVE-2025-48927 and CVE-2025-48928, to access federal chat logs and metadata. CISA has given federal agencies until July 22 to apply patches.

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Federal chat app hacked

The new comes months after then-US national security advisor Mike Waltz accidentally added Jeffrey Goldberg, editor in chief at ...


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