CVE-2026-35225

Improper timeout handling in CODESYS EtherNetIP

CVSS 8.7 HIGHEPSS 0.4%CWE-754

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

23 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

CODESYS · CODESYS EtherNetIP

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References

https://codesys.csaf-tp.certvde.com/.well-known/csaf/white/2026/advisory2026-04_vde-2026-040.json https://www.certvde.com/en/advisories/VDE-2026-040/