Hackers timed attacks for maximum impact, says researcher

Microsoft today said it's investigating reports of a new unpatched vulnerability in Internet Explorer (IE) that did not get patched in yesterday's massive update.

"Other researchers, meanwhile, said that the timing of the attacks, which have already started, was not coincidental.

"The updates Microsoft released yesterday do not address this possible vulnerability," a Microsoft spokesman said today in an e-mail reply to questions, "but I can tell you that Microsoft is investigating these new public claims of a possible vulnerability in Internet Explorer."

Exploit code, which first surfaced in China, is actively seeking out victims, according to security researchers there and in the U.S. Those researchers have found attack code on multiple malicious domains and servers. Elsewhere today, an exploit was posted to the milw0rm.com site, a popular destination for public posting. "

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