Microsoft today patched 19 vulnerabilities in Windows, Internet Explorer 9 (IE9), Excel and the .Net development framework, including four flaws in the just-released Windows 8 and its tablet spin-off Windows RT.
Of Tuesday's six security updates, four were labeled "critical," Microsoft's most-severe threat ranking, while the remaining pair were pegged as "important" or "moderate." Of the 19 vulnerabilities patched today, seven...