For the month of February, Microsoft has announced 9 bulletins addressing 21 vulnerabilities.
Bulletin breakdown:
These updates will be applied to all Microsoft Operating Systems, All supported Internet Explorer browsers, Visio Viewer 2010, SharePoint Server 2010, SharePoint Foundation 2010 and Silverlight 4
The following table summarises the security bulletins for this month in order of severity.
| Bulletin ID | Maximum Severity Rating and Vulnerability Impact | Restart Requirement | Affected Software |
| Bulletin 1 | Critical | Requires restart | Microsoft Windows |
| Remote Code Execution | |||
| Bulletin 2 | Critical | Requires restart | Microsoft Windows, Internet Explorer |
| Remote Code Execution | |||
| Bulletin 3 | Critical | Requires restart | Microsoft Windows |
| Remote Code Execution | |||
| Bulletin 4 | Critical | May require restart | Microsoft .NET Framework, Microsoft Silverlight |
| Elevation of Privilege | |||
| Bulletin 5 | Important | Requires restart | Microsoft Windows |
| Elevation of Privilege | |||
| Bulletin 6 | Important | May require restart | Microsoft Office, Microsoft Server Software |
| Elevation of Privilege | |||
| Bulletin 7 | Important | May require restart | Microsoft Windows |
| Remote Code Execution | |||
| Bulletin 8 | Important | May require restart | Microsoft Windows |
| Remote Code Execution | |||
| Bulletin 9 | Important | May require restart | Microsoft Office |
| Remote Code Execution |
We will issue further information on the impact of this month’s updates once they have been released for testing from the 15th of February 2012.