Patch Tuesday this week will include fixes for six security bugs, three of which are rated 'critical'.
The critical holes, all of which could allow a hacker to execute code remotely on a target system, affect Window 2000 SP4, Excel 2000, and the .Net Framework, which most Windows users will have installed, according to a Microsoft security bulletin. Microsoft is not issuing further details of the problems until the fixes are delivered next Tuesday.
Two other patches fix "important" flaws in Microsoft Office, Microsoft Publisher and Windows XP Professional. The sixth patch is for a "moderate" Windows Vista flaw.
Microsoft's "Patch Tuesday" has become a regular feature. Microsoft is increasingly offering details of the patches in advance, so that IT departments can prepare for them, avoiding the risk of "Exploit Wednesday".
Peter Judge reported for ZDNet UK from London
