At Skype, we take security very seriously.

There was an issue with an older version of the Skype for Windows desktop installer version 7.40 and lower. The issue was in the program that installs the Skype software the issue was not in the Skype software itself. Customers who have already installed this version of Skype for Windows desktop are not affected. We have removed this older version of Skype for Windows desktop from our website skype.com.

The installer for the current version of Skype for Windows desktop (v8) does NOT have this issue, and it has been available since October, 2017.


Source: Update on Skype for Windows desktop installer version 7.40 and - Microsoft Community