CVE-2026-35227

HighCVSS 8.2/10Last modified Oct 26, 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.

Metrics

CVSS 4.0 8.2/10CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness enumeration

CWE-772

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
CODESYSCODESYS Modbus>= 1.0.0.0, < 4.6.0.0

References

Timeline

Published
May 12, 2026
Last modified
Oct 26, 2026
NVD status
Awaiting Analysis

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