Hi,
First of all, it is not an .exe, it is a Perl script. Second, this is the
very first bug report I see about this, and hence I assumed quite a bit of
time ago that git-cvsserver is just a maintenance burden for nothing of
value at all, and therefore it is excluded from the end-user facing Git
for Windows installer.
If you still want to use it, you can use it in Git for Windows' SDK [*1*],
but you should be aware that the onus of investigating and fixing bugs
lies with you, then... `git cvsserver` is not part of the officially
supported Git for Windows.
Ciao,
Johannes
Footnote *1*:
https://gitforwindows.org/#download-sdk