Data from almost 8,000 servers in UK could be stolen in Microsoft hack Revelation comes after Microsoft revealed that Chinese hackers had exploited security flaws in its Exchange email services 11 March 2021 • 6:00am Private data from almost 8,000 servers in the UK could be stolen due to a serious flaw in Microsoft’s Exchange email software that has been exploited by state-backed hackers. Seven thousand nine hundred UK servers out of a total of 125,000 globally are vulnerable to the flaw, experts from US cybersecurity business Palo Alto Networks have warned. They are likely to include systems used by businesses, charities, healthcare organisations, law firms, defence contractors and government bodies.