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CODESYS-Control-RTE-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.

CVE-2025-41738 is a vulnerability classified under CWE-843 (Access of Resource Using Incompatible Type, commonly known as type confusion) found in the CODESYS Control Runtime Environment (RTE) for the SL platform, specifically version 3.5.18.0. The vulnerability resides in the visualisation server component of the runtime system, which is responsible for rendering and managing human-machine interface (HMI) visualizations in industrial automation setups. An unauthenticated remote attacker can exploit this flaw by sending specially crafted network requests that cause the server to dereference pointers of an incorrect type. This type confusion can lead to memory corruption, resulting in a denial-of-service (DoS) condition by crashing the visualisation server or causing it to become unresponsive. The vulnerability has a CVSS v3.1 base score of 7.5, indicating high severity, with an attack vector of network (AV:N), no privileges required (PR:N), no user interaction (UI:N), and impact limited to availability (A:H) without affecting confidentiality or integrity. No known exploits have been reported in the wild as of the publication date, but the ease of remote exploitation without authentication makes this a critical concern for industrial environments that rely on CODESYS for control and monitoring. The lack of available patches at the time of disclosure necessitates immediate risk mitigation through network segmentation and monitoring until vendor fixes are released.

Detailed information about CVE-2025-41738: CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') in CODESYS CODESYS Control RTE (SL) affecting C

CVE-2025-41738: CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') in CODESYS CODESYS Control RTE (SL) - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-41738: CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') in CODESYS CODESYS Control RTE (SL)

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