# CVE-2026-35227

## Summary

- **CVE ID:** CVE-2026-35227
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-772
- **Published:** May 12, 2026
- **Last Modified:** May 13, 2026

## Description

An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race condition in connection handling is successfully exploited, preventing legitimate clients from establishing new connections.

## Affected Products

- CODESYS — CODESYS Modbus (1.0.0.0)

## References

- [CNA](https://certvde.com/de/advisories/VDE-2026-042)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._