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This vulnerability represents a critical shift in mobile security where a memory-corruption flaw in WeChat's VoIP stack enables cross-platform zero-click propagation between iOS and Android devices. The ability to weaponize trusted social graph connections without user interaction highlights the severe risks inherent in scaling AI-driven or automated communication protocols within massive ecosystems like Tencent's. While the immediate threat involves traditional exploit chains, this incident underscores the fragility of modern messaging infrastructure against wormable attacks that could scale rapidly if not rigorously patched.
WeWorm – First 0-Click Worm Spreading Through WeChat Calls Across iOS and Android

A proof-of-concept zero-click worm dubbed “WeWorm” that it says can spread through WeChat voice calls on both iOS and Android, compromising a target’s WeChat account in seconds without the victim answering the call. Calif says the bug was reported to Tencent in July and that Tencent has since mitigated the exploit for users, but the […] The post WeWorm – First 0-Click Worm Spreading Through WeChat Calls Across iOS and Android appeared first on Cyber Security News.
A proof-of-concept zero-click worm dubbed “WeWorm” that it says can spread through WeChat voice calls on both iOS and Android, compromising a target’s WeChat account in seconds without the victim answering the call. Calif says the bug was reported to Tencent in July and that Tencent has since mitigated the exploit for users, but the research still serves as a stark warning about how mobile messaging apps can become wormable attack surfaces at planetary scale. WeChat is not a niche target. Tencent…
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