Description
An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| CODESYS | Control RTE (SL) | 3.5.21.10 – < 3.5.21.20 | 3.5.21.20 |
| CODESYS | Control RTE (for Beckhoff CX) SL | 3.5.21.10 – < 3.5.21.20 | 3.5.21.20 |
| CODESYS | Control Win (SL) | 3.5.21.10 – < 3.5.21.20 | 3.5.21.20 |
| CODESYS | HMI (SL) | 3.5.21.10 – < 3.5.21.20 | 3.5.21.20 |
| CODESYS | Control for BeagleBone SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for emPC-A/iMX6 SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for IOT2000 SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for Linux ARM SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for Linux SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for PFC100 SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for PFC200 SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for PLCnext SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for Raspberry Pi SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Control for WAGO Touch Panels 600 SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
| CODESYS | Virtual Control SL | 4.16.0.0 – < 4.17.0.0 | 4.17.0.0 |
Advisories 5
- ICSA-26-132-03 ABB AC500 V3 Multiple Vulnerabilities CISA ICS & IT advisories · May 12, 2026
- VDE-2026-005 ifm: Multiple Vulnerabilities in CR3171 CERT@VDE · May 6, 2026
- 3ADR011524 AC500 V3 Multiple vulnerabilities ABB PSIRT · Feb 24, 2026
- ADVISORY2025-08_VDE-2025-070 CODESYS Control V3 - NULL pointer dereference CERT@VDE · Oct 14, 2025
- WID-SEC-2025-1705 CODESYS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 4, 2025