Advisory2026-01_VDE-2026-012

CODESYS Installer - Possible Privilege Escalation

The CODESYS Installer is affected by a privilege escalation vulnerability. Due to a race condition, a local attacker with limited privileges can replace the verified downloaded setup before execution. Because the update process runs with administrator privileges, a malicious application can be executed with elevated rights. The attack requires the legitimate user to confirm the self‑update prompt for the CODESYS Installer itself or to initiate an installation of a CODESYS Development System. The update process for CODESYS Add-Ons is not affected by this issue.