Microsoft got an early start on Patch Tuesday, releasing a series of out-of-band security updates this week to address four zero-day vulnerabilities in Exchange Server. There’s been a lot of security activity in the news, so I’m sure it is going to be a busy Patch Tuesday. The Microsoft Security Response Center reported known attacks against Exchange Server by the hacking group Hafnium. The four vulnerabilities involved in the exploit are CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and … More

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