While he was still a cadet, Szilágyi joined the senior Hungarian team for the 2007 World Fencing Championships in Saint-Petersburg. Hungary won their first gold medal in men's sabre since 1998 after defeating France 45–43. For this performance, Tamás Decsi, Balázs Lontay, Zsolt Nemcsik and Áron Szilágyi were named Hungarian team of the year.