Good news regarding the IE Zero Day, MS14-021 has released and includes support for Windows XP
Microsoft has announced Security Bulletin MS14-021 on Technet to resolve the IE Zero Day identified on April 26th. The Shavlik Content team is investigating and will be releasing support for this bulletin as soon as possible. A restart will be required to apply the patch. Also, if you have applied any of the mitigation steps you will need to take a look at the 'Workarounds' section of the bulletin to see if the steps you chose will need to be reverted.
For those of you on Windows XP, the bulletin identifies variations on IE 6, 7, and 8 and according to the MSRC post today, Microsoft has decided to support this bulletin on Windows XP. According to Dustin Child's post Microsoft "...made the decision to issue a security update for Windows XP users. Windows XP is no longer supported by Microsoft, and we continue to encourage customers to migrate to a modern operating system...".
Watch for the Shavlik Content Announcement later today once we have tested and made it available to our customers.