Add-ins are special files that provide additional functionality. After downloading an add-in file, the Add-ins Manager must be used to install it. Add-ins files have extension .xla or .xlam (for Excel ...

Microsoft plans to add a feature to Office Excel that will make it harder for cyberattackers to exploit the spreadsheet application's "add-ins" function to run malicious code on a victim's computer.

A new report urges Microsoft Excel users to take action to protect themselves from a dramatic rise in cyberattacks using malicious add-in files. In its Threat Insights Report for the fourth quarter of ...