Four zero-day exploits add urgency to October’s Patch Tuesday

October brings four zero-day exploits and 74 updates to the Windows ecosystem, including a hard-to-test kernel update (CVE-2021-40449) that requires immediate attention and an Exchange Server update that requires technical skill and due diligence (and a reboot). The testing profile for the October Patch Tuesday covers Windows error handling, AppX, Hyper-V and Microsoft Word. We recommend a Patch Now schedule for Windows and then staging the remaining patch groups according to your normal release pattern.

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