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Microsoft's very bad year for security: A timeline

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Microsoft
Security

So far, 2021 has proved to be somewhat of a security annus horribilis for tech giant Microsoft, with numerous vulnerabilities impacting several of its leading services, including Active Directory, Exchange, and Azure. Microsoft is no stranger to being targeted by attackers seeking to exploit known and zero-day vulnerabilities, but the rate and scale of the incidents it has faced since early March has put the tech giant on its back foot for at least a moment or two.

What follows is a timeline of the significant security events that have afflicted Microsoft in 2021, why it remains susceptible to serious vulnerabilities and attacks, and an assessment of its response according to experts from across the cybersecurity sector.

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