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AgentsThe story, in brief

Muse, Meta's extraordinarily privileged AI assistant, has a serious 0-day

Meta's new AI agent has a critical 0-day. A simple ClickFix attack can hijack it entirely.

Reporting by Ars Technica 1 min brief
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The KeyNews take

Why it matters

Agent security vulnerability in production deployment. A 0-day in a privileged agent used at scale raises urgent questions about agent reliability and threat surface in enterprise deployments.

The key facts

5 to know

  1. Meta agent 'Muse' has critical 0-day vulnerability

  2. ClickFix attack method can completely hijack the agent

  3. Agent described as 'extraordinarily privileged' — high system access

  4. Published by Ars Technica (credible security outlet)

  5. September 2026 publication date

Go to the source

Ars Technicaarstechnica.com

Publisher excerpt: A simple ClickFix attack is only one way to completely hijack the new agent.
Read original report
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