Around 12% of the 45,000 or so Microsoft Exchange servers in Germany that can be accessed from the Internet without restrictions “are so outdated that security updates are no longer offered for them,” the German Federal Office for Information Security (BSI) has warned today. Also, around 25 percent of all those internet-facing servers run Exchange 2016 and 2019, but are not up-to-date with security patches.

Source: Help Net Security