Updates for Exchange 2003 SP1
Today Microsoft released a fairly important security fix for Exchange 2003. More information can be found about this fix in KB article 894549 and it can be downloaded here. (There is an Exchange 2000 version of this update, also. See the KB article). This vulnerability could allow denial of service attacks or remote code execution, so it should be applied as soon as practical.
In addition, there is a roll-up fix for Exchange 2003 Service Pack 1 that was released the first of February. The download information and the fixes can be found in KB article 883652. This updates and fixes any bugs found in the Cdoexm.dll and Maildsmx.dll files.
There is also a roll-up fix for Exchange 2003 Service Pack 1 that was released November. The download is here and the fix information can be found in KB article 883543. This fix updates Outlook Web Access 2003 components. Warning, if you have customized your LOGON.ASP, this will overwrite it.