Next scheduled release: June 11th, 2013
The heads up for this month is; On Tuesday 11th June (US time; Wednesday 12th June AU time) Microsoft expect to release five (5) new security bulletins. One (1) bulletin carries a maximum aggregate rating of Critical, and four (4) are rated Important.
Today we’re providing Advance Notification of five bulletins for release on Tuesday, June 11, 2013. This release brings one Critical- and four Important-class bulletins. The Critical-rated bulletin addresses issues in Internet Explorer, and the Important-rated bulletins address issues in Microsoft Windows and Office. 
 Advanced Notification Service for the June 2013 Security Bulletin Release (2013-Jun-06) [MSRC]