Microsoft email server hacks put Biden in a bind

The scale of a hack on Microsoft Exchange is beginning to emerge, with tens of thousands of organisations potentially compromised.

The attack used previously unknown flaws in the email software - and sometimes stolen passwords - to steal data from targets' networks.

Microsoft says the attackers are "state-sponsored and operating out of China".

And while it initially thought the number of attacks had been "limited", it has since reported "increased use" of the tactics - probably because other hackers are piling in to take advantage of the now public vulnerabilities before systems are patched

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