It's the second Tuesday of this month and as scheduled, Microsoft has released several security bulletins with six critical and three important updates.
The updates resolve vulnerabilities found on several applications including Office Excel, Internet Explorer, and GDI. Most of these vulnerabilities allow remote code execution and one allows an elevation of privileges.
For more information as well as links for the actual patches, see August's bulletin.
As always, it's good to perform a system update ASAP.