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CVE-2026-3509

CODESYS Control Audit Log Format String DoS

Published: Mar 24, 2026Updated: Mar 24, 2026 Sources: CVE List NVDCWE-134
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 73.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-134

Affected Products

CODESYS Control RTE (SL)CODESYSICS / OT / IoT
CODESYS Control RTE (for Beckhoff CX) SLCODESYSICS / OT / IoT
CODESYS Control Win (SL)CODESYSICS / OT / IoT
CODESYS Runtime ToolkitCODESYSICS / OT / IoT
CODESYS Control for BeagleBone SLCODESYSICS / OT / IoT
codesysoss-projectDEICS / OT / IoTaka codesys gmbh
and 10 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://certvde.com/de/advisories/VDE-2026-018
certvde.com

Timeline

Published
Mar 24, 2026
Last Updated
Mar 24, 2026

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