Microsoft's September batch of security updates will include patches for at least five vulnerabilities in several Windows and MSN-branded software products.
One of the five bulletins applies to the Windows operating system and will be rated critical, the Microsoft's highest severity rating.
The other four bulletins scheduled for release on September 11 will be rated "important," according an an advance notice from Redmond.
[ SEE: MSN Messenger vulnerable to 'highly critical' webcam flaw ]
The fixes will address a "remote code execution" issue affecting MSN Messenger 6.2, MSN Messenger 7.0, MSN Messenger 7.5 and Windows Live Messenger 8.0.
It is not yet known if this update will address the recently discussed buffer overflow vulnerability in the MSN Messenger's webcam functionality. Exploit code for that bug is in circulation.
According to Microsoft, one of the "important" bulletins will contain security patches for Windows Vista.
The patch batch will also include fixes for: Visual Studio, Windows Services for UNIX, Subsystem for UNIX-based Applications and Sharepoint Server.