April 2011 Office Security Update Release

Update: We are aware some of you are experiencing issues with two of the updates, KB2509470 (Outlook), 2464588 (PowerPoint).

KB2464588 issues have been addressed with a new update: https://blogs.technet.com/b/office_sustained_engineering/archive/2011/04/23/issues-after-installing-powerpoint-2003-update-kb2464588.aspx

In both cases, we are working on publishing an update to resolve the issues caused by those releases. We expect to release these updates as a hotfix to resolve those issues. We expect to have a PowerPoint update available for manual download before Monday, April 25th. We expect to have an Outlook update posted no later by Friday, April 29th. We'll keep this blog post updated as we have more information to share.

If you have further questions, you can contact Microsoft Support for further assistance. For home users, no-charge support is available by calling 1-866-PCSAFETY in the United States and Canada or by contacting your local Microsoft subsidiary. For more information about how to contact your local Microsoft subsidiary for support issues with security updates , visit the Microsoft International Support website:

The April Public Update release for Office is now live and available for download. This release contains 4 security bulletins, 1 security advisory, and 8 non-security updates.

The following Security updates were released for:

Microsoft Security Bulletin MS11-021

· Security Update for Microsoft Excel 2002 (KB2466169)
· Security Update for Microsoft Excel 2010 (KB2466146), 32-bit / 64-bit Edition
· Security Update for the 2007 Microsoft Office System (KB2466156)
· Security Update for Microsoft Office Excel 2003 (KB2502786)
· Security Update for Microsoft Office Excel 2007 (KB2464583)
· Security Update for Microsoft Office Excel Viewer (KB2466158)

Microsoft Security Bulletin MS11-023 and MS11-029 (XP Only)

· Security Update for Microsoft Office XP (KB2509461)
· Security Update for Microsoft Office 2003 (KB2509503)
· Security Update for Microsoft Office 2007 System (KB2509488)

Microsoft Security Bulletin MS11-022

· Security Update for Microsoft Office 2007 System (KB2464635)
· Security Update for Microsoft PowerPoint 2002 (KB2464617)
· Security Update for Microsoft Office PowerPoint 2003 (KB2464588)
· Security Update for Microsoft Office PowerPoint 2007 (KB2464594)
· Security Update for Microsoft PowerPoint 2010 (KB2519975), 32-bit / 64-bit Edition
· Security Update for Microsoft Office PowerPoint Viewer 2007 (KB2464623)
· Security Update for PowerPoint Viewer 2010 (KB2519984)
· Security Update for Microsoft Office Web Apps 2010 (KB2520047)

Microsoft Security Advisory (2501584) - Release of Microsoft Office File Validation for Microsoft Office

· Security Update for Microsoft Office Word 2007 (KB2464605)
· Security Update for Microsoft Office Word 2003 (KB2464603)
· Security Update for Microsoft Office Publisher 2007 (KB2464599)
· Security Update for Microsoft Office Publisher 2003 (KB2464598)

Joining the security bulletins were a handful of non-security updates:

· Update for Microsoft Office 2007 System  (KB2508958) which will decrease installation failures for updates installed on Microsoft Office 2007.
· Update for Microsoft Office Web Apps (KB2510648) which provides critical compatibility updates for customers running mixed-mode server deployments.
· Update for Microsoft SharePoint Server 2010 (KB2510639) which provides critical compatibility updates for customers running mixed-mode server deployments.
· Update for Microsoft Office Outlook 2007 (KB2509470) which provides stability and performance improvements.

As with normal cadence, Outlook Junk Email Filters for Office 2003, 2007 and 2010 32-bit/64-bit were also updated.