CVE-2026-3509 — HIGH (7.5) — White Hats Nepal

Vulnerability 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 Score

7.5

HIGH

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

Related Weaknesses (CWE)

CWE-134

References

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

FAQ

What is CVE-2026-3509?

CVE-2026-3509 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 (...

How severe is CVE-2026-3509?

CVE-2026-3509 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-3509?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.