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Microsoft MHTML flaw targeted by hackers

The company has not yet issued a patch for the Mime HTML vulnerability, which was first noted by Microsoft in an advisory in January.

Tom Espiner Special to CNET News

Microsoft has warned that hackers are targeting a zero-day flaw that affects all Windows operating systems.

The flaw, which was first highlighted by Microsoft in an advisory in January, allows an attacker to inject a client-side script into the response to a request made by Internet Explorer. The script could allow a hacker to compromise the user--by performing actions online that appear to have originated from the user; by stealing information from the user; or by otherwise trying to fool them.

The company updated its January security advisory on Friday, saying that it had seen attacks in the wild.

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