PATCH WATCH UPDATE: According to a TechNet blog post, Microsoft will release an official patch today for the widely reported IE vulnerability. The post states that Microsoft has reversed it no-support policy for XP and will release an update for that OS.
Windows 8.x users should already see KB 2961887, an update for Internet Explorer Flash Player.
UPDATE: Microsoft released KB 2964358 (MS14-021), a critical IE update for all workstation versions of Windows — including Windows XP SP3.
Note: According to the release notes, IE will crash on Win7 systems if the update is installed before KB 2929437....