@tcward_ The maker of software that is used in the highest echelons of gov, including the White House and NSA, was compromised by attackers who slipped malicious code into the software maker's trusted code without the software maker knowing it. The code got distributed to its customers
@tcward_ That malicious code, once it infected customer systems, opened a backdoor into those systems and contacted the hackers to let them know the door was open for them to surreptitiously enter those systems and begin stealing sensitive data on those networks.
@tcward_ The hackers did this back in March and their activity was only recently discovered - this means they have been inside gov systems all these months stealing data and spying on gov workers without anyone knowing until now. They also infected telecoms and other company networks.
@tcward_ Here is a list of some of the customers who use the software made by the software maker (their name is SolarWinds). All of these were potentially compromised. 
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