CVE-2026-3509 Details
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.
A vulnerability exists in the CODESYS Control runtime system's Audit Log component, allowing unauthenticated remote attackers to manipulate the format string of log messages. This exploitation can cause a denial-of-service condition by crashing the CODESYS Control runtime, disrupting industrial control systems.
Users can update to CODESYS Control RTE (SL), CODESYS Control RTE (for Beckhoff CX) SL, CODESYS Control Win (SL), or CODESYS Runtime Toolkit, all to version 3.5.22.0. For CODESYS Control for BeagleBone SL, CODESYS Control for emPC-A/iMX6 SL, CODESYS Control for IOT2000 SL, CODESYS Control for Linux ARM SL, CODESYS Control for Linux SL, CODESYS Control for PFC100 SL, CODESYS Control for PFC200 SL, CODESYS Control for PLCnext SL, CODESYS Control for Raspberry Pi SL, CODESYS Control for WAGO Touch Panels 600 SL, or CODESYS Virtual Control SL, users should update to version 4.21.0.0, expected in Q2 2026.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://certvde.com/de/advisories/VDE-2026-018 | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-134 | Use of Externally-Controlled Format String | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | New CVE Received | [email protected] |