: Newer versions of Office typically receive more frequent security updates. Using older versions may expose your documents and data to security risks.
Note that this list might not be exhaustive, as the "Index Of Parent Directory" could potentially include many other items depending on the context.
Downloading from unauthorized open directories is risky because files can be modified to include Remote Access Trojans (RATs)
Assuming you ignore the legal risks, let’s look at what actually happens when you download Setup.exe from an unknown Index of / page.
: Even non-executable files in these directories (like sample templates) can contain malicious macros or embedded links designed for credential phishing.
C:\Program Files\Microsoft Office\root\Office16
: Pirated versions lack critical security patches, leaving your system vulnerable to newly discovered exploits.