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ICS Advisories
Advisories specifically aimed at industrial control systems — from CISA ICS-CERT and directly from vendors (including Siemens, ABB, Schneider Electric, WAGO and Phoenix Contact) — including revision history (initial publication, Update A, Update B) and linked CVEs.
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Advisory data: live connection— last retrieved: 7 November 2026 at 03:37.
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VDE-2025-042
Lenze: VPN Client Privilege Escalation in combination with Lenze x500 IoT Gateway
Risk evaluation
The Lenze VPN client is vulnerable to a Local Privilege Escalation to root/SYSTEM by executing a configuration file which can be controlled by a non-privileged user. This occurs through a race condition exploit, where an attacker can overwrite the temporary OpenVPN configuration file located in a world-writable directory. By injecting malicious commands into the configuration file prior to its execution by the VPN client, an attacker can trigger arbitrary code execution with root/system privileges when a VPN connection is initiated. The vulnerability has been remediated in the version 1.4.4 of the Lenze VPN client. Due to some further developments and completion of the functional scope, it is recommended to update the firmware of the x500 IoT Gateway devices immediately, regardless of the current security vulnerability in the VPN client.
Mitigation summary
Obtain the updated VPN software (version >= 1.4.4) from https://cloud.lenze.digital/fleet-manager/tools and run the installer on a windows and macOS system or run the following commands in an linux system: tar -xzf vpn_client_x64.tar.gz cd vpn_client_x64 sudo ./install
Revision history (1)
Initial publication — 27 May 2025
Initial version