US warns of active cyber threat targeting critical infrastructure

Federal agencies are warning that hackers are actively targeting industrial control systems used across U.S. water plants, factories, energy facilities and other critical infrastructure.

The NSA, FBI, Department of Energy, EPA and Cybersecurity and Infrastructure Security Agency said Wednesday there is an “active threat” targeting Siemens S7 Series programmable logic controllers.

Siemens said Thursday that it had not detected an increased level of attacks or any previously unknown vulnerabilities affecting its industrial control systems products.

The devices are used to monitor and control industrial equipment across sectors including…

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