While individual users rarely face lawsuits, companies and educational institutions have been fined thousands for using unlicensed software. The BSA (Business Software Alliance) actively tracks piracy.
As for a direct download link for a patch, I recommend checking the official Magix support page or forums related to Sony Vegas Pro for the most current and safe options.
You do not need to risk a "patch." Here are better, legal options:
Despite the risks, the search term remains popular for several reasons: