CVE-2026-35225 HIGH

CVE-2026-35225: Improper timeout handling in CODESYS EtherNetIP

Vendor Codesys

Product CODESYS EtherNetIP

Weakness CWE-754

Published April 23, 2026

Last update April 23, 2026

View on NVD All CVEs

CVSS base score

8.7/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality —

Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 23, 2026 CVE published

April 23, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-35225 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/754.html

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