In each case, police say it appears an air/BB type gun was used.
In some cases, eggs were also thrown on the vehicles, causing further damage.
All of the incidents occurred inside the loop around Cary made by Maynard Road, or just outside of it.
Police say nothing was taken from the cars.
Anyone with information is encouraged to contact the Town of Cary Police Department at (919) 469-4012 or Cary Crime Stoppers at (919) 226-CRIM(E). Crime Stoppers pays up to $2,500 for information leading to the arrest or indictment of those responsible for committing certain types of crimes. All calls will be kept confidential at caller's request.