Chinese Hackers Exploit ZyXEL Switch Flaw, CISA Orders Federal Patch by Thursday

A Chinese threat actor has exploited a vulnerability in ZyXEL GS1900 series switches to exfiltrate sensitive information from nearly 1,000 devices.

CISA confirmed active exploitation of the flaw and ordered U.S. federal agencies to patch by Thursday. Any organization running ZyXEL GS1900 switches should prioritize patching regardless of the federal deadline.