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Microsoft today released updates to fix more than 50 security holes in its Windows operating systems and other software, including patches for a whopping six "zero-day" vulnerabilities that attackers are already exploiting in the wild.

Separate fixes to macOS and iOS patch respective flaws in the kernel and WebKit that can allow threat actors to take over devices and are under attack.

An insufficient validation input flaw, one of 11 patched in an update this week, could allow for arbitrary code execution and is under active attack.