The risks (ransomware, legal fines, identity theft) far outweigh the benefit of a free AutoCAD license. The "UPD" variant is particularly dangerous because it specifically targets recent security patches designed to detect cracks.
If the cost is the main barrier, high-quality free alternatives like Xf-adsk2018-x64.exe UPD
: Files of this nature often contain Trojans, ransomware, or spyware hidden within the code to compromise the user's system. Legal & Ethical The risks (ransomware, legal fines, identity theft) far
Before you run Xf-adsk2018-x64.exe and reformat your hard drive, consider that you have legal, safe options for using professional CAD software. The risks (ransomware
: The tool often includes a "Patch" button that modifies the software's internal licensing service (LMTOOLS or similar) in real-time to accept the forged activation code.