CVE-2026-35225
High
Description
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductCODESYS EtherNetIP
PublishedApr 23, 2026
First seenApr 23, 2026
Weakness typeCWE-754CWE-754
How to fix
Update
- CODESYS CODESYS EtherNetIP4.9.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CODESYS CODESYS EtherNetIP | 1.0.0.0 ≤ v < 4.9.0.0 | 4.9.0.0 |
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