Vulnerabilities can come back to bite you.

CISA has increasingly used its emergency-directive authority to try to keep foreign spies or criminals from burrowing into federal networks

The episode highlights how, with thousands of software vulnerabilities released each year, some matter much more than others.

The bugs are in Citrix software that allows clients to remotely connect to corporate networks with their mobile phones.

With hackers exploiting a critical bug in its products, Citrix has expedited its timeline for patching.

A fix is on the way, the company says.