CVE-2026-2542 identifies an unquoted search path vulnerability in Total VPN version 0.5.29.0 on Windows, specifically in the executable located at C:\Program Files\Total VPN\win-service.exe. An unquoted search path occurs when a Windows service or executable path containing spaces is not enclosed in quotes, allowing an attacker to place a malicious executable in a directory earlier in the search order. When the vulnerable service starts, it may inadvertently execute the malicious code. This vulnerability requires local access with low privileges and does not require user interaction, but the attack complexity is high, indicating that exploitation demands significant skill or specific conditions. The vulnerability impacts confidentiality, integrity, and availability by enabling potential privilege escalation and arbitrary code execution. The vendor was notified but has not responded or issued a patch, leaving systems exposed. No known exploits have been reported in the wild, but the risk remains due to the nature of the vulnerability and the lack of remediation. The CVSS 4.0 score is 7.3 (high), reflecting the potential impact and difficulty of exploitation.

The primary impact of CVE-2026-2542 is local privilege escalation on Windows systems running Total VPN 0.5.29.0. An attacker with low-level access could leverage this vulnerability to execute arbitrary code with higher privileges, potentially gaining control over the system or sensitive VPN configurations. This could lead to unauthorized data access, disruption of VPN services, or further lateral movement within a network. Organizations relying on Total VPN for secure communications may face confidentiality breaches and integrity compromises. The difficulty of exploitation reduces immediate risk but does not eliminate it, especially in environments where local access controls are weak or where attackers have already gained footholds. The absence of vendor response and patches increases the window of exposure, making timely mitigation critical.

To mitigate CVE-2026-2542, organizations should first restrict local access to systems running Total VPN to trusted users only, minimizing the risk of local exploitation. Administrators can manually check the installation directory for unquoted paths and rename directories or executables to remove spaces or add quotes in service configurations if possible. Employ application whitelisting to prevent unauthorized executables from running in the search path. Monitor systems for unusual process creation or privilege escalation attempts. Since no official patch is available, consider temporarily disabling or uninstalling Total VPN 0.5.29.0 on critical systems until a vendor fix is released. Additionally, implement robust endpoint detection and response (EDR) solutions to detect exploitation attempts. Regularly audit and harden Windows service configurations to avoid similar unquoted path issues in other software.