PT-2026-34663 · Codesys · Codesys Ethernetip

Published 2026-04-23 · Updated 2026-04-23 · CVE-2026-35225

Mitre

CVSS v4.0

8.7

High

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

An unauthenticated remote attacker is able to exhaust all available TCP connections in the CODESYS EtherNet/IP adapter stack, preventing legitimate clients from establishing new connections.

Fix

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

CVE-2026-35225

Affected Products

Codesys Ethernetip

References · 3

• https://certvde.com/en/advisories/VDE-2026-040 · Vendor Advisory
• https://codesys.csaf-tp.certvde.com/.well-known/csaf/white/2026/advisory2026-04_vde-2026-040.json · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35225 · Security Note