Cato VPN Client: Split-Tunnel and Privilege Escalation (CVE-2026-10739)

Introduction During a Purple Team engagement, we had to list and rank risky components across the network. One of them caught our attention: Cato Client, a VPN client program. It was installed everywhere. It runs privileged services. It talks to a GUI. It handles network configuration. From an attacker perspective, this is exactly the kind of software you want to understand. However, saying "this looks risky" is not enough. There is nothing better than PoC||GTFO. So the question was simple: can ...