The recently discovered “TunnelVision” vulnerability poses a serious threat to VPN users by potentially nullifying the protective capabilities of VPN connections. First documented in a report by Leviathan Security, this flaw has been inherent in VPN applications since 2002, specifically exploiting a weakness in the Dynamic Host Configuration Protocol (DHCP) that handles static routes on client systems. The vulnerability, tracked as CVE-2024-3661, is exploited by attackers setting up rogue DHCP servers to reroute VPN traffic away from its secure tunnel, exposing it to easy interception on local networks or through malicious gateways. This process, referred to as “decloaking,” strips the VPN traffic of its encryption, making conventional VPN defenses like control channels and kill switches ineffective. The severity of this vulnerability is particularly critical for individuals who depend heavily on secure communications, such as journalists and whistleblowers. Leviathan Security suggests that one of the potential solutions could involve the use of network namespaces to isolate interfaces and protect routing tables, thereby safeguarding VPN traffic. The broader implications of this vulnerability highlight a crucial need for urgent measures to patch this flaw and secure VPN infrastructures to protect sensitive user data globally.