CODESYS Runtime Toolkit vulnerabilities (CVE)

CVE records published for CODESYS Runtime Toolkit, newest first. Follow to get an email when a new one appears.

5 results
7.5High
CVE-2026-76992

Uncontrolled Memory Allocation in CODESYS Gateway Client

CODESYS Development System 3; CODESYS Gateway; CODESYS Edge Gateway for Windows; CODESYS HMI (SL)

The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger excessive memory cons…

8.1High
CVE-2026-79625

Improper Synchronization in Monitoring in CODESYS Control Runtime

CODESYS Control RTE (SL); CODESYS Control RTE (for Beckhoff CX) SL; CODESYS Control Win (SL); CODESYS Runtime Toolkit

Affected products do not properly synchronize access to their monitoring functionality. When multiple clients send concurrent requests, this may lead to incorrect reads or writes, or to corruption of internal memory structures. An authenticated remote attacke…

7.5High
CVE-2025-41738

CODESYS Control - Invalid type usage in visualization

CODESYS CODESYS Control RTE (SL); CODESYS CODESYS Control RTE (for Beckhoff CX) SL; CODESYS CODESYS Control Win (SL); CODESYS CODESYS HMI (SL)

An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading to a denial-of-service (DoS) condition.

8.3High
CVE-2025-41659

CODESYS Control PKI Exposure Enables Remote Certificate Access

CODESYS Control RTE (SL); CODESYS Control RTE (for Beckhoff CX) SL; CODESYS Control Win (SL); CODESYS HMI (SL)

A low-privileged attacker can remotely access the PKI folder of the CODESYS Control runtime system and thus read and write certificates and its keys. This allows sensitive data to be extracted or to accept certificates as trusted. Although all services remain…