ESET: at least ten, mostly state-backed hacking groups are exploiting Microsoft Exchange vulnerabilities on thousands of servers in over 115 countries

ESET: at least ten, mostly state-backed hacking groups are exploiting Microsoft Exchange vulnerabilities on thousands of servers in over 115 countries  —  Days before Microsoft released a fix for a secret attack on its email systems, hackers ramped up their activity.  Now experts say swift action is required.