Re: If these exploits are so *old*
I was curious on this as well so I did a bit of looking. It's an old MS Office bug in 2016/2013/2010 that has since been fixed and a patch issued.
The countries we are talking about here more than likely have a lot of companies that don't have MS licences and more than likely grab an ISO of whatever version of Office people know and stick that on. They may not even give it a second thought until they get caught out. It could be staff sticking their own ISO of office on their machine. The IT departments might be more concerned with keeping the virus software and firewall up to date hoping that will save them.
That's my thoughts on it. We aren't all in polished, well documented, anal retentive on updates for every piece of software IT departments. It kind makes my head spin (it doesn't but it could) when you think about every component to a well functioning IT team and all the various moving parts that have to move together for it all to work.