The most fundamental difference between VPNs and zero trust security frameworks is that traditional VPNs trust blindly. With a VPN, once access is granted, a remote user gains total access to the network. To summarize the major vulnerabilities of VPNs, the following attributes stand out: 1. VPNs over-simplify authentication. 2. VPNs don’t scale. 3. VPNs aren’t optimized for employee experience.