CVE-2026-3509
High
Description
An unauthenticated remote attacker may be able to control the format string of messages processed by the Audit Log of the CODESYS Control runtime system, potentially resulting in a denial‑of‑service (DoS) condition.
SeverityHigh
CVSS7.5
Exploit probability—
ProductCODESYS Control RTE (SL)
PublishedMar 24, 2026
First seenMar 24, 2026
Weakness typeCWE-134CWE-134
How to fix
Update
- CODESYS CODESYS Control RTE (SL)3.5.22.0 or later
- CODESYS CODESYS Control RTE (for Beckhoff CX) SL3.5.22.0 or later
- CODESYS CODESYS Control Win (SL)3.5.22.0 or later
- CODESYS CODESYS Runtime Toolkit3.5.22.0 or later
- CODESYS CODESYS Control for BeagleBone SL4.21.0.0 or later
- CODESYS CODESYS Control for emPC-A/iMX6 SL4.21.0.0 or later
- CODESYS CODESYS Control for IOT2000 SL4.21.0.0 or later
- CODESYS CODESYS Control for Linux ARM SL4.21.0.0 or later
- CODESYS CODESYS Control for Linux SL4.21.0.0 or later
- CODESYS CODESYS Control for PFC100 SL4.21.0.0 or later
- CODESYS CODESYS Control for PFC200 SL4.21.0.0 or later
- CODESYS CODESYS Control for PLCnext SL4.21.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CODESYS CODESYS Control RTE (SL) | 3.5.17.0 ≤ v < 3.5.22.0 | 3.5.22.0 |
| CODESYS CODESYS Control RTE (for Beckhoff CX) SL | 3.5.17.0 ≤ v < 3.5.22.0 | 3.5.22.0 |
| CODESYS CODESYS Control Win (SL) | 3.5.17.0 ≤ v < 3.5.22.0 | 3.5.22.0 |
| CODESYS CODESYS Runtime Toolkit | 3.5.17.0 ≤ v < 3.5.22.0 | 3.5.22.0 |
| CODESYS CODESYS Control for BeagleBone SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for emPC-A/iMX6 SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for IOT2000 SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for Linux ARM SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for Linux SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for PFC100 SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for PFC200 SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for PLCnext SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for Raspberry Pi SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for WAGO Touch Panels 600 SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Virtual Control SL | 4.1.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
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