Microsoft has issued patches today for Internet Explorer and Visual Studio.
The flaws in Internet Explorer running on XP, Vista, and 2000 are rated as critical while computer with Windows Server operating systems have a rating of moderate.
Users are advised to patch their machines as soon as possible.
Vulnerable ActiveX controls triggered the IE flaws. The flaws let an attcker run a command or download malware on a vulnerable PC when a user view a malicious webpage.