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AI worms self-propagate through Microsoft Word's Copilot

By PulseAugur Editorial · [6 sources] ·

A new type of AI worm has been discovered that can self-propagate through Microsoft Word documents using Copilot. The worm exploits prompt injection vulnerabilities, where hidden instructions in a document are interpreted by Copilot as user commands. This causes Copilot to alter the document and then copy the malicious instructions into the new document, turning it into a carrier for further propagation. While Microsoft was informed and had a 144-day coordination period, no complete mitigation is yet available, and users are advised to treat externally sourced documents with caution when using Copilot. AI

IMPACT This discovery highlights a new attack vector for AI-powered tools, potentially impacting enterprise security and user trust in AI assistants.

RANK_REASON Discovery of a novel vulnerability in an AI-powered productivity tool.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 6 sources. How we write summaries →

AI worms self-propagate through Microsoft Word's Copilot

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Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Discovery of a novel vulnerability in an AI-powered productivity tool.
Source corroboration
6 independent sources
Strong cross-source corroboration — multiple independent publishers covered this within the clustering window.
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product, safety
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High
Clearly on-topic for AI-industry coverage.
Story freshness
59 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [6]

  1. Simon Willison TIER_1 English(EN) ·

    AI Worming through Word

    <p><strong><a href="https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/">AI Worming through Word</a></strong></p> Neat new prompt injection variant by Håkon Måløy, who found a way to upgrade prompt injection attacks against Microsoft Word to full self-re…

  2. Hacker News — AI stories ≥50 points TIER_1 English(EN) · Canopy9560 ·

    Document-borne AI worms can self-propagate through Copilot for Word

  3. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    Document-borne AI worms can self-propagate through Copilot for Word https:// enklypesalt.com/posts/context- collapse-part3-ai-worming-through-word/ # ai

    Document-borne AI worms can self-propagate through Copilot for Word https:// enklypesalt.com/posts/context- collapse-part3-ai-worming-through-word/ # ai

    LINKS enklypesalt.com/…/context-collapse-part3-…
  4. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    Document-borne AI worms can self-propagate through Copilot for Word https:// enklypesalt.com/posts/context- collapse-part3-ai-worming-through-word/ # ai

    Document-borne AI worms can self-propagate through Copilot for Word https:// enklypesalt.com/posts/context- collapse-part3-ai-worming-through-word/ # ai

    LINKS enklypesalt.com/…/context-collapse-part3-…
  5. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    Copilot will propagate a malicious worm from one Word document to another https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/ # Securi

    Copilot will propagate a malicious worm from one Word document to another https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/ # Security # AI # Malware

    LINKS enklypesalt.com/…/context-collapse-part3-…
  6. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    Document-borne AI worms can self-propagate through Copilot for Word https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/ # HackerNews #

    Document-borne AI worms can self-propagate through Copilot for Word https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/ # HackerNews # Tech # AI

    LINKS enklypesalt.com/…/context-collapse-part3-…

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