German site iPhone-Ticker reports [Google translation] that Apple is planning to release iOS 6.1.2 early next week to address both the Exchange bug and lock screen passcode issue affecting iOS 6.1 users. According to the report, iOS 6.1.2 is likely to arrive before Wednesday, February 20.
iPhone-Ticker has previously offered accurate information on iOS update schedules, including word of the iOS 6.1.1 update [Google translation] a few hours before it was released to the public.
Article Link: iOS 6.1.2 to Address Exchange and Passcode Bugs Reportedly Coming Early Next Week