There's yet another zero-day flaw in yet another MS product. This time, several versions of the software giant's spreadsheet program, Excel, are affected. ComputerWorld's got a brief run-down, along with a link to MS's advisory. Of course, there's no fix yet.

"The flaw could be exploited to run unauthorized software on a Windows PC, but for this to happen, attackers would first need to either trick an Excel user into visiting a malicious Web site or to open a malicious Excel attachment."