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    CVE-2026-3509

    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.

    Published:Mar 24, 2026
    Last Modified:Mar 26, 2026
    EPS:Mar 24, 2026
    EPSS Score:0.00081
    CVSS Score:7.5

    Affected Products

    Vendor
    Codesys
    Product
    Control For Beaglebone Sl
    Vendor
    Codesys
    Product
    Control For Empc-a/imx6 Sl
    Vendor
    Codesys
    Product
    Control For Iot2000 Sl
    Vendor
    Codesys
    Product
    Control For Linux Arm Sl
    Vendor
    Codesys
    Product
    Control For Linux Sl
    Vendor
    Codesys
    Product
    Control For Pfc100 Sl
    Vendor
    Codesys
    Product
    Control For Pfc200 Sl
    Vendor
    Codesys
    Product
    Control For Plcnext Sl
    Vendor
    Codesys
    Product
    Control For Raspberry Pi Sl
    Vendor
    Codesys
    Product
    Control For Wago Touch Panels 600 Sl
    Vendor
    Codesys
    Product
    Control Rte (sl)
    Vendor
    Codesys
    Product
    Control Rte \(for Beckhoff Cx\) Sl
    Vendor
    Codesys
    Product
    Control Win (sl)
    Vendor
    Codesys
    Product
    Runtime Toolkit
    Vendor
    Codesys
    Product
    Virtual Control Sl

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-135 Format String Injection
    CAPEC-67 String Format Overflow in syslog()

    Related CVEs

    CVE-2026-8047 (CVSS 8.7) — The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a siz…
    CVE-2026-8046 (CVSS 7.2) — The affected products insufficiently verify authorization when deleting user accounts. An authenticated, low-p…
    CVE-2025-41660 (CVSS 8.8) — A low-privileged remote attacker may be able to replace the boot application of the CODESYS Control runtime sy…
    CVE-2025-41738 (CVSS 7.5) — An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to…
    CVE-2025-41739 (CVSS 5.9) — An unauthenticated remote attacker, who beats a race condition, can exploit a flaw in the communication server…
    CVE-2024-8175 (CVSS 7.5) — An unauthenticated remote attacker can causes the CODESYS web server to access invalid memory which results in…
    CVE-2023-6357 (CVSS 8.8) — A low-privileged remote attacker could exploit the vulnerability and inject additional system commands via fil…
    CVE-2022-4046 (CVSS 8.8) — In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buf…
    CVE-2023-37559 (CVSS 6.5) — After successful authentication as a user in multiple Codesys products in multiple versions, specific crafted …
    CVE-2023-37558 (CVSS 6.5) — After successful authentication as a user in multiple Codesys products in multiple versions, specific crafted …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High