One of the big problems here will be for any country which makes a lot of use of older computers using Windows XP as there is no patch for this vulnerability on

One of the big problems here will be for any country which makes a lot of use of older computers using Windows XP as there is no patch for this vulnerability on that OS version. How many systems that is, is debatable but by at least one benchmark (https://www.netmarketshare.com/operating-system-market-share.aspx?qprid=10&qpcustomd=0 https://www.netmarketshare.com/operating-system-market-share...) we're looking at 7% of the desktop PC market that could be exposed with no patch available.