https://www.theguardian.com/world/2020/dec/14/solarwinds-breach-orion-hacked-cyber-espionage?CMP=Share_AndroidApp_Other

Orion hack exposed vast number of targets – impact may not be known for a while

By compromising one piece of security software – a security tool called Orion developed by the Texan company SolarWinds – the attackers gained access to an extraordinary array of potential targets in the US alone: more than 425 of the Fortune 500 list of top companies; all of the top 10 telecommunications companies; all five branches of the military; and all of the top five accounting firms.

But they are just a fraction of SolarWinds’ 300,000 global customers, which also include UK government agencies and private sector companies.