Microsoft has released updates to Office 2008 and 2011, which include bug fixes and patches for security issues. The Office 2008 update include a fix for two PowerPoint vulnerabilities:
The vulnerabilities could allow remote code execution if a user opens a specially crafted PowerPoint file. An attacker who successfully exploited either of the vulnerabilities could take complete control of an affected system. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
And the Office 2011 update fixes a similar vulnerability in Word.
Office users can update their software using Microsoft’s AutoUpdate application, or can download the updaters: Office 2008 update, 285 MB or Office 2011 update, 113 MB.