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TI-2026-03023 Aliases CVE-2026-3509GHSA-34rr-qp2j-p4q7

CODESYS Control Audit Log Format String DoS

Priority LOW 39CWE-134Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-134 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0036 29th percentileScored 2026-11-07
Fix Fixed CODESYS Control RTE (SL) (CODESYS): 3.5.22.0CODESYS Control RTE (for Beckhoff CX) SL (CODESYS): 3.5.22.0+13 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CODESYSCODESYS Control RTE (SL)3.5.17.0 to before 3.5.22.03.5.22.0Patch availableCNA
CODESYSCODESYS Control RTE (for Beckhoff CX) SL3.5.17.0 to before 3.5.22.03.5.22.0Patch availableCNA
CODESYSCODESYS Control Win (SL)3.5.17.0 to before 3.5.22.03.5.22.0Patch availableCNA
CODESYSCODESYS Runtime Toolkit3.5.17.0 to before 3.5.22.03.5.22.0Patch availableCNA
CODESYSCODESYS Control for BeagleBone SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for emPC-A/iMX6 SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for IOT2000 SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for Linux ARM SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for Linux SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for PFC100 SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for PFC200 SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for PLCnext SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for Raspberry Pi SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Control for WAGO Touch Panels 600 SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
CODESYSCODESYS Virtual Control SL4.1.0.0 to before 4.21.0.04.21.0.0Patch availableCNA
  • CODESYS Control RTE (SL) VendorCODESYS Affected 3.5.17.0 to before 3.5.22.0 Fixed in 3.5.22.0 Patch available CNA
  • CODESYS Control RTE (for Beckhoff CX) SL VendorCODESYS Affected 3.5.17.0 to before 3.5.22.0 Fixed in 3.5.22.0 Patch available CNA
  • CODESYS Control Win (SL) VendorCODESYS Affected 3.5.17.0 to before 3.5.22.0 Fixed in 3.5.22.0 Patch available CNA
  • CODESYS Runtime Toolkit VendorCODESYS Affected 3.5.17.0 to before 3.5.22.0 Fixed in 3.5.22.0 Patch available CNA
  • CODESYS Control for BeagleBone SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for emPC-A/iMX6 SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for IOT2000 SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for Linux ARM SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for Linux SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for PFC100 SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for PFC200 SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for PLCnext SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for Raspberry Pi SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Control for WAGO Touch Panels 600 SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA
  • CODESYS Virtual Control SL VendorCODESYS Affected 4.1.0.0 to before 4.21.0.0 Fixed in 4.21.0.0 Patch available CNA

Remediation

  • Fix · CNA CODESYS Control RTE (SL) (CODESYS) Fixed in 3.5.22.0
  • Fix · CNA CODESYS Control RTE (for Beckhoff CX) SL (CODESYS) Fixed in 3.5.22.0
  • Fix · CNA CODESYS Control Win (SL) (CODESYS) Fixed in 3.5.22.0
  • Fix · CNA CODESYS Runtime Toolkit (CODESYS) Fixed in 3.5.22.0
  • Fix · CNA CODESYS Control for BeagleBone SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for emPC-A/iMX6 SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for IOT2000 SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for Linux ARM SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for Linux SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for PFC100 SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for PFC200 SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for PLCnext SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for Raspberry Pi SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Control for WAGO Touch Panels 600 SL (CODESYS) Fixed in 4.21.0.0
  • Fix · CNA CODESYS Virtual Control SL (CODESYS) Fixed in 4.21.0.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    CODESYS Control RTE (SL), CODESYS Control RTE (for Beckhoff CX) SL and 13 more products 3.5.22.0, 4.21.0.0

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2025-27626 CODESYS Control Boot Application Replacement Enables Code ExecutionPriority MEDIUM 40
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3509
  2. 2026-10-03 Alias added: GHSA-34rr-qp2j-p4q7
  3. 2026-10-25 Priority changed: MEDIUM → LOW

References

Other 1

  • TI-2021-12888 CODESYS Control Runtime system before 3.5.17.10 has a Heap-based Buffer Overflow. CVSS 3.1CRITICAL 9.8
  • TI-2019-10180 Stack-based buffer overflow in CODESYS V3 web server CVSS 3.1CRITICAL 9.8
  • TI-2021-13604 CODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS) CVSS 3.1HIGH 7.5
  • TI-2020-08257 CODESYS V3 web server before 3.5.15.40, as used in CODESYS Control runtime systems, has a buffer overflow. CVSS 3.1CRITICAL 9.8
  • TI-2019-13592 CODESYS 3 web server before 3.5.15.20, as distributed with CODESYS Control runtime systems, has a Buffer Overflow. CVSS 3.1CRITICAL 9.8
  • TI-2017-03937 Unrestricted file upload in 3S-Smart Software Solutions GmbH CODESYS Web Server CVSS 3.0CRITICAL 9.8
See all 155 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences