Pictured: the Mountain View, California regional headquarters of Microsoft, which just patched 120 software vulnerabilities for Patch Tuesday. (Smith Collection/Gado/Getty Images)

With its latest regularly scheduled security update, Microsoft has fixed 120 software vulnerabilities, including 17 critical flaws, one of which is a zero-day bug that has been actively exploited in the wild.

Microsoft this year has already eclipsed the total number of patches it issued during all of 2019 -- a pace that experts at Trend Micro's Zero-Day Initiative (ZDI) says presents a patching management challenge for businesses.

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