# CVE-2026-3509

## Summary

- **CVE ID:** CVE-2026-3509
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-134
- **Published:** Mar 24, 2026
- **Last Modified:** Mar 26, 2026

## 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.

## Affected Products

- CODESYS — CODESYS Control RTE (SL) (3.5.17.0)
- CODESYS — CODESYS Control RTE (for Beckhoff CX) SL (3.5.17.0)
- CODESYS — CODESYS Control Win (SL) (3.5.17.0)
- CODESYS — CODESYS Runtime Toolkit (3.5.17.0)
- CODESYS — CODESYS Control for BeagleBone SL (4.1.0.0)
- CODESYS — CODESYS Control for emPC-A/iMX6 SL (4.1.0.0)
- CODESYS — CODESYS Control for IOT2000 SL (4.1.0.0)
- CODESYS — CODESYS Control for Linux ARM SL (4.1.0.0)
- CODESYS — CODESYS Control for Linux SL (4.1.0.0)
- CODESYS — CODESYS Control for PFC100 SL (4.1.0.0)
- CODESYS — CODESYS Control for PFC200 SL (4.1.0.0)
- CODESYS — CODESYS Control for PLCnext SL (4.1.0.0)
- CODESYS — CODESYS Control for Raspberry Pi SL (4.1.0.0)
- CODESYS — CODESYS Control for WAGO Touch Panels 600 SL (4.1.0.0)
- CODESYS — CODESYS Virtual Control SL (4.1.0.0)

## References

- [CNA](https://certvde.com/de/advisories/VDE-2026-018)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._