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HIGHCVE-2026-3509Published Modified CNA CERTVDE

CVE-2026-3509: CODESYS Control Audit Log Format String DoS

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.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
3.5.22.0
Affected Products
15

Fix available

3.5.22.04.21.0.0
Affected packages
  • CODESYS / CODESYS Control RTE (SL)
    < 3.5.22.0 (from 3.5.17.0)
  • CODESYS / CODESYS Control RTE (for Beckhoff CX) SL
    < 3.5.22.0 (from 3.5.17.0)
  • CODESYS / CODESYS Control Win (SL)
    < 3.5.22.0 (from 3.5.17.0)
  • CODESYS / CODESYS Runtime Toolkit
    < 3.5.22.0 (from 3.5.17.0)
  • CODESYS / CODESYS Control for BeagleBone SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for emPC-A/iMX6 SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for IOT2000 SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for Linux ARM SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for Linux SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for PFC100 SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for PFC200 SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for PLCnext SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for Raspberry Pi SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Control for WAGO Touch Panels 600 SL
    < 4.21.0.0 (from 4.1.0.0)
  • CODESYS / CODESYS Virtual Control SL
    < 4.21.0.0 (from 4.1.0.0)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References