There was a TCP/IP bug that shared it’s exploit on versions of windows from windows for workgroups 3.11 (which you ran from the DOS prompt by typing ‘win’) through to windows 7 (which was the new hotness at the time)
That’s a bug conserved from the very first Microsoft implementation of TCP/IP through to the state of the art at the time
People were surprised at the time that it wasn’t a windows NT bug