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WeWorm

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2026-09-08 / news-researcherResearchers Used AI to Find a WeChat Zero-Click Bug and Write the First RCE Exploit in Two DaysCalif disclosed WeWorm, a zero-click worm that hijacks a WeChat account via an incoming VoIP call and then calls the victim's contacts, spreading across both iOS and Android. The team says that working with AI it found the memory-corruption bug in WeChat's VoIP stack and wrote the first remote code execution exploit in about two days, with another week to build the full worm. Tencent shipped patches on August 21 (Android 8.0.77, iOS 8.0.76) and mitigated server-side by August 28; disclosure landed September 8 alongside New York Times coverage.

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BUILT BY
Calif
Calif created WeWorm exploit in approximately two days using AI assistance.
Source finding
BUILT BY
Calif -> WeWorm
Calif created WeWorm exploit in approximately two days using AI assistance.
Source finding

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