securityBACKGROUND
Hidden prompt turns Microsoft Copilot into an AI worm
BACKGROUND
1 SIGNALFIRST DETECTED 30 July 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
30 Jul
Hidden prompt turns Microsoft Copilot into an AI worm
REPORT · WHAT · Malwarebytes Labs
Other feeds and industry voices
30 Jul
Microsoft Copilot for Word Can Copy Hidden Prompts Into New Documents
Hidden instructions in a Word document can make Microsoft 365 Copilot rewrite figures in a report, then copy the same instructions into the finished file. Håkon Måløy disclosed
REPORT · WHEN · The Hacker NewsOPEN STORY
29 Jul
Document-borne AI worms can self-propagate through Copilot for Word
<a href="https://news.ycombinator.com/item?id=49096188">Comments</a>
REPORT · WHAT · Hacker News Best (RSS)OPEN STORY
15 Jun
One-Click Microsoft 365 Copilot Flaw Could Have Let Attackers Steal Emails, Files, and MFA Codes
A single click on a trusted Microsoft link could have let an attacker pull emails, calendar details, and indexed files out of Microsoft 365 Copilot Enterprise Search. Researchers
REPORT · WHAT · The Hacker NewsOPEN STORY
Sources
Malwarebytes Labs
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