Enabling JavaScript should make Excel more powerful, but increasing access points makes it even more of a web security nightmare than it already is.

Tricking someone into enabling macros on a downloaded Microsoft Excel or Word file is an old hacker chestnut. That one click from a target creates a foothold for attackers to take over their ...

If Excel keeps blocking files from being inserted, chances are the file is blocked by Trust Center, or maybe the workbook or locked. Here's the fix!

Microsoft reissues its Excel security update, designed to resolve a bug in the software that prevents users from opening files created in certain foreign languages.

This new phishing attack features a weaponized Excel file Security researchers warn about a sneaky phishing campaign from one of the most creative cybercrime groups on the internet.

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

Microsoft today issued patches for seven potentially dangerous security flaws in the Microsoft Excel worksheet software and warned that hackers could launch remote code execution attacks if a ...

* On Excel 2003, prevent Excel repair mode by modifying the ACL to the Excel Resiliency registry key; block all Excel file types at the e-mail gateway; do not open or save Excel files that you ...

Microsoft said the Excel flaws could be targeted by an attacker using a malformed range, a malformed parsing format file, a malformed description, a malformed graphic or a malformed record.

Microsoft Excel lets you embed content from other applications, including PDF files. You can embed a PDF file into a cell of an Excel worksheet and then use Excel's security features to lock the ...