CVE-2025-12694 in VPN Client
Summary
by MITRE • 06/04/2026
A local privilege escalation vulnerability exists in Forcepoint VPN Client that allows a local non-administrative user to escalate privileges to SYSTEM. This issue affects VPN Client for Windows: versions 6.11.3 and prior.
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Analysis
by VulDB Data Team • 06/04/2026
This local privilege escalation vulnerability in Forcepoint VPN Client represents a critical security flaw that undermines the principle of least privilege and could enable malicious actors to gain system-level control. The vulnerability specifically affects Windows versions of the VPN client up to and including version 6.11.3, where a local non-administrative user can exploit a flaw in the application's privilege handling mechanisms to escalate their access level to SYSTEM. This type of vulnerability falls under the category of local privilege escalation as defined by CWE-264, which encompasses issues where attackers can elevate their privileges from a lower-privilege account to a higher-privilege account within the same system. The flaw likely stems from improper access control checks or insecure privilege management within the VPN client's Windows service or executable components.
The technical implementation of this vulnerability appears to involve a weakness in how the Forcepoint VPN Client handles user permissions and privilege separation during runtime operations. Attackers can leverage this flaw to execute arbitrary code with SYSTEM privileges, potentially allowing them to modify system files, install malicious software, or access sensitive data that would normally be restricted to administrative users. This represents a significant operational risk as the vulnerability can be exploited by any local user without requiring administrative credentials or complex attack vectors. The attack surface is particularly concerning given that VPN clients often run with elevated privileges to manage network connections and system-level network access, creating a prime target for privilege escalation attacks.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and data exfiltration capabilities. Once elevated to SYSTEM level, an attacker can bypass most Windows security controls including file access restrictions, registry protections, and other system-level security mechanisms. This vulnerability directly maps to ATT&CK technique T1068 which covers "Local Privilege Escalation" and could enable further lateral movement within the network. Organizations running affected versions of Forcepoint VPN Client face significant risk as this vulnerability can be exploited by malware, insider threats, or attackers who have already gained access to a user account on the system. The impact is particularly severe in enterprise environments where VPN clients are widely deployed and may be running with elevated privileges to perform network management functions.
Mitigation strategies for this vulnerability should focus on immediate patching of the Forcepoint VPN Client to versions beyond 6.11.3 where the privilege escalation flaw has been addressed. Organizations should also implement monitoring for suspicious privilege escalation activities and ensure that VPN client components are running with the minimum necessary privileges. System administrators should conduct immediate vulnerability assessments to identify all affected systems and ensure that the VPN client is properly configured to avoid running with unnecessary elevated privileges. Additionally, organizations should consider implementing application whitelisting policies to prevent unauthorized execution of vulnerable components and regularly audit system privileges to ensure that users cannot escalate their privileges through similar mechanisms. The vulnerability demonstrates the importance of proper privilege management and access control implementation in network security applications, aligning with security best practices outlined in NIST SP 800-53 and other cybersecurity frameworks.