If you get an email with an attachments that claims to be the world’s funniest spreadsheet, give yourself a shake and reconsider just how funny an Excel file could possibly be.  Even if it looks legitimate, if you receive an Excel attachment from a stranger you should probably not open it.  According to this story on Slashdot there is an exploit out there that will affect any Excel from 2000 up to 2007 SP1.  Microsoft’s next scheduled patch is due to come out March 9th, hopefully there will be a solution by then at the latest.

“Microsoft Excel has a zero-day vulnerability that attackers are exploiting on the Internet, according to security vendor Symantec. The problem affects Excel 2007 both without and with Service Pack 1, according to an advisory on SecurityFocus, and other versions going back to Excel 2000. The program’s vulnerability can be exploited if a user opens a maliciously crafted Excel file, allowing a hacker to leave a Trojan horse on the infected system.”

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