New research shows that over 4 million systems on the internet, including VPN servers and home routers, are vulnerable to attacks due to tunneling protocol vulnerabilities.

The research was conducted by Mathy Vanhoef, a professor at the KU Leuven university in Belgium, and PhD student Angelos Beitis, in collaboration with VPN testing company Top10VPN. Vanhoef is well known for his Wi-Fi security research, including for the attacks named Dragonblood, KRACK and FragAttacks.