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Security/Simon Willison LLMs/September 10, 2026 at 12:56 AM

Quoting Calif Research

Today, we're releasing a demo of WeWorm, the first zero-click worm to spread through WeChat calls across iOS and Android. [...] The victim does not need to answer the call, or interact with their phone at all. Even if they do answer, they hear nothing, and the exploit still succeeds. [...] Working with AI, our team found the bug and wrote the first remote code execution (RCE) exploit in about two days. Building the worm took one more week. A worm at this scale used to be the kind of thing that took a larger team months. AI can already do most of the work here. Our team provided the judgment about what to target and how to test it safely. — Calif Research , WeWorm Tags: ai-security-research , ai , llms , security , generative-ai

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Quoting Calif Research | The AI Front Page