UltraSurf is a application. This is the biggest red flag for privacy purists. Because you cannot audit the code, you must trust that:
The primary use cases for UltraSurf fall into three categories: ultrasurf.exe
Use ultrasurf.exe to read a blocked news article or access social media. Do not use it for online banking, logging into work email, or whistleblowing. For those activities, use a full VPN (like ProtonVPN or Mullvad). UltraSurf is a application
is a powerful, nimble tool that has helped millions bypass censorship. For quick, anonymous web browsing from a USB stick, it is one of the best portable solutions ever created. However, it is not a security product—it is an evasion product. treat it as a disposable privacy tool, not a permanent security solution. Always download the .exe from the official source, run it as a limited user when possible, and never trust it with your passwords. Do not use it for online banking, logging