Trend Micro researchers are warning of malware that exploits a recently patched flaw in Windows Media Player.

"Roland Dela Paz, a threat response engineer at Trend Micro, said in a blog post that researchers spotted malicious HTML being hosted that exploits the vulnerability and executes a trojan that includes rootkit functionality," Infosecurity reports.

"The flaw, a MIDI (musical instrument digital interface) remote code execution vulnerability (CVE-2012-0003), was patched by Microsoft in this month’s Patch Tuesday release," the article states.

Go to "Warning issued for exploit of patched flaw in Windows Media Player" to read the details.

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