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Security researchers have identified an unpatched vulnerability in Windows. The flaw - which affects all supported versions of Windows bar Windows 2003 - resides in a security bug in Microsoft XML Core Services, specifically an unspecified security bug in the XMLHTTP 4.0 ActiveX Control.

The flaw creates a means for hackers to inject malware onto the PCs of surfers running IE who visit a website hosting malicious code that attempts to harness the security bug. Security notification firm Secunia says that the vulnerability is being actively exploited by hackers.

Microsoft has posted an advisory conceding the problem and suggesting possible workarounds, which basically involve disabling the affected ActiveX control, ahead of the arrival of a patch. ®

Agentless Backup is Not a Myth