How long has this vulnerability been known but kept quiet for use in the NSA's library of exploits? EternalBlue was based on a Windows exploit they knew about but withheld from Microsoft so they could continue to exploit it. That deliberate withholding of information has cost many organizations a lot of money:
https://www.forbes.com/sites/kalevleetaru/2019/05/25/as-eter...
https://www.nytimes.com/2019/05/25/us/nsa-hacking-tool-balti...
Is this another problem that could have been fixed a long time ago?