Courtesy of ZDNet:

In light of Adobe’s recently released security updates for its Flash Player, Microsoft is working closely with Adobe to release an update for Adobe Flash in IE10 to protect our mutual customers. This update will be available shortly. Ultimately, our goal is to make sure the Flash Player in Windows 8 is always secure and up-to-date, and to align our release schedule as closely to Adobe’s as possible.
Microsoft to deliver Flash update to Windows 8 users 'shortly' | ZDNet