No your cat's RFID tag is not going to infect your home computer.

A Dutch university released a study that claims RFID tags are not secure because they can be used to exploit security weaknesses in computer systems that use them.  I didn't know this university existed before this study. After reading this study I would be embarrassed to attended the university.  The report is complete crap. You can find a greater list of exploits by reading a Best Practices document. You can also find out how to secure your app against those exploits in the same document. Can RFID tags contain a virus?  They can contain data that could be used to to take advantage of an exploit in an application that is not very secure.  That same application is at risk with or without the RFID technology. We might as well state that hard drive technology is not secure since the same data could be contained on a hard drive. My best guess is that the authors are not programmers and have very little experience with application security. If they are programmers, I wouldn't trust an app they wrote. Most likely they have a political motive behind creating the report.