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Microsoft confirms an AI worm is propagating through Copilot and other MS apps

Although there are a few ways to mitigate the risk, the only way to block it is to get AI to differentiate instructions from data, which is impossible today.

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computerworld.comStai leggendo5 g fa

Microsoft confirms an AI worm is propagating through Copilot and other MS apps

Microsoft confirmed an AI worm self-propagating through Copilot when malicious instructions in documents replicate into new content. The worm bypasses email, DLP, endpoint security through legitimate workflows, corrupting financial documents—unprecedented supply-chain risk.

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Timeline cronologica

mercoledì 29 luglio 2026·theregister.com
Word worm crawls into Copilot, spreads chaos
Researcher says months of coordination with Microsoft have yet to produce a robust mitigation
mercoledì 29 luglio 2026·ilsoftware.it
Un worm AI può propagarsi attraverso i documenti Word
Un prompt nascosto in Word può manipolare Copilot e replicarsi nei documenti successivi: come funziona l'attacco e come difendersi.

Microsoft confirms an AI worm is propagating through Copilot and other MS apps

Confronto fonti

Microsoft confirms an AI worm is propagating through Copilot and other MS apps

Timeline cronologica

Word worm crawls into Copilot, spreads chaos

Un worm AI può propagarsi attraverso i documenti Word

AI Worms in Word: How Document-Borne Threats Self-Propagate

Hidden prompt turns Microsoft Copilot into an AI worm

A security researcher built a self-spreading worm that hides inside Word docs and hijacks Microsoft Copilot

Word worm crawls into Copilot, spreads chaos

Microsoft Copilot’s ‘Word worm’ still works 144 days after disclosure

AI Worms in Word: How Document-Borne Threats Self-Propagate

Microsoft confirms an AI worm is propagating through Copilot and other MS apps

Copilot worm can spread through Microsoft Word docs

Aktive Lücke in Copilot: So werden aus Word-Dokumenten Computerwürmer

Microsoft Copilot’s ‘Word worm’ still works 144 days after disclosure

Hidden prompt turns Microsoft Copilot into an AI worm

Versteckte Eingabeaufforderung verwandelt Microsoft Copilot in einen KI-Wurm

Copilot for Word Will Copy Its Own Poison Into Every Document It Touches

A security researcher built a self-spreading worm that hides inside Word docs and hijacks Microsoft Copilot