A 'fascinating' Microsoft Excel security flaw teams up spreadsheets and Copilot Agent to steal data

There's more than one way to skin an Excel table, and this one abuses Copilot.
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Excel security is a myth: Passwords and hidden rows won't save your data, but this will

Excel is designed for transparency and calculation, which is exactly why it's so bad at keeping secrets. It offers plenty of ways to keep your data out of sight, but don't mistake those for actual ...
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Microsoft 365 to block downloaded Excel XLL add-ins to boost security

Microsoft is working on adding XLL add-in protection for Microsoft 365 customers by including automated blocking of all such files downloaded from the Internet. This will help tackle the rise of ...