CVE-2026-3509
CODESYS Control Audit Log Format String DoS
CVSS Score
7.5
EPSS Score
0.1%
EPSS Percentile
24th
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.
| CWE | CWE-134 |
| Vendor | codesys |
| Product | codesys control rte (sl) |
| Published | Mar 24, 2026 |
| Last Updated | Mar 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
CODESYS / CODESYS Control RTE (SL)
3.5.17.0 < 3.5.22.0
CODESYS / CODESYS Control RTE (for Beckhoff CX) SL
3.5.17.0 < 3.5.22.0
CODESYS / CODESYS Control Win (SL)
3.5.17.0 < 3.5.22.0
CODESYS / CODESYS Runtime Toolkit
3.5.17.0 < 3.5.22.0
CODESYS / CODESYS Control for BeagleBone SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for emPC-A/iMX6 SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for IOT2000 SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for Linux ARM SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for Linux SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for PFC100 SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for PFC200 SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for PLCnext SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for Raspberry Pi SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Control for WAGO Touch Panels 600 SL
4.1.0.0 < 4.21.0.0
CODESYS / CODESYS Virtual Control SL
4.1.0.0 < 4.21.0.0