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Tencent deploys server fix for WeChat vulnerability flagged by Calif

9/9/2026

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Summary

Story summary

Tencent deployed a server-side fix for the WeChat vulnerability flagged by U.S. firm Calif.
Calif reported its AI identified a critical WeChat flaw in July.
Calif demonstrated its AI-built “WeWorm” could hijack WeChat accounts via unanswered voice calls.
Tencent said there is no evidence the vulnerability was exploited or users affected.
Analysts said AI-driven threats increase urgency for U.S.–China cybersecurity cooperation.

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Story summary

Tencent deployed a server-side fix for the WeChat vulnerability flagged by U.S. firm Calif.
Calif reported its AI identified a critical WeChat flaw in July.
Calif demonstrated its AI-built “WeWorm” could hijack WeChat accounts via unanswered voice calls.
Tencent said there is no evidence the vulnerability was exploited or users affected.
Analysts said AI-driven threats increase urgency for U.S.–China cybersecurity cooperation.