In a few minutes I’ll talk with this week’s guest commentator, Dinah Davis, vice president of research and development of managed security services provider Arctic Wolf. But first a look back at some of the news this week: Four more serious vulnerabilities have been found in on-premise versions of Microsoft Exchange. That means – again – IT departments have to make sure the latest patches are installed as soon as possible. This comes after Microsoft released emergency patches last month to close the holes on a number of vulnerabilities in Exchange Server. It’s bad enough that criminal hackers and nation-states are getting into unpatched Exchange implementations to read email. Now a new report says crooks are also trying to take over Exchange servers to install cryptocurrency miners. It’s vital your firm’s Exchange Server is patched.