PT-2026-27353 · Codesys · Codesys Control Runtime System

CVE-2026-3509 · Published 2026-03-24 · Updated 2026-03-24

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions CODESYS Control Runtime System (affected versions not specified)

Description An unauthenticated remote attacker may be able to control the format string of messages processed by the Audit Log, potentially leading to a denial-of-service (DoS) condition. The issue involves the manipulation of format strings, which could disrupt the normal operation of the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use of Externally-Controlled Format String

Weakness Enumeration

CWE-134

Related Identifiers

CVE-2026-3509

Affected Products

Codesys Control Runtime System

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-3509 · Security Note
• https://twitter.com/VulmonFeeds/status/2036436824193732934 · Twitter Post
• https://certvde.com/de/advisories/VDE-2026-018 · Note