As experts warn about cyberattacks from Iran on the US, CISA is operating under a partial government shutdown and dealing with leadership changes (Samantha Subin/CNBC)

Samantha Subin / CNBC: As experts warn about cyberattacks from Iran on the US, CISA is operating under a partial government shutdown and dealing with leadership changes   —  As the fighting in the Middle East roars on, cyber experts are increasingly warning of online attacks from Iran on U.S. businesses and infrastructure.