The fun part is they don't know the extent of the comprise or how long it has been going on.
What happened is that CISA recently published a report stating that they think a lot of US telecommunications equipment has been compromised. It isn't a one time breach. They know that China has control over a unspecified amount of critical components. The malware China is using is extremely complex and very hard if not completely impossible to detect. China is very good at covering there tracks so even getting a sample of Malware is hard.
Because of all this, CISA is now recommending that people use encrypted messagers.
Meme mentions CISA and FBI but everyone knows NSA already has a master list of vulns that they juggle deciding if they're worth disclosing or better off keeping for themselves lol.
They sat on Eternal Blue for allegedly a decade. Any APT has plenty of time and money to spend attacking America's public infara when they don't even bother to cover the bargain basement stuff like the insanity that is Microsoft AD.
I wonder if China is any better with their hefty surveillance and firewall though. I wouldn't be completely surpised if some of their public infara is also exposed for the same reasons.