Improper resource management in CODESYS Modbus TCP Server_CVE-2026-35227

8.2 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-35227

Source CERTVDE

Published May 12, 2026 at 07:14

Affected Product

Vendor CODESYS

Product CODESYS Modbus

Version 1.0.0.0

Affected Versions CODESYS CODESYS Modbus 1.0.0.0

CWE Classification

CWE-772

References

certvde.com /de/advisories/VDE-2026-042

{
    "lastseen": "",
    "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.",
    "published": "2026-05-12T07:14:41.517Z",
    "modified": "2026-05-12T07:14:41.517Z",
    "type": "cve",
    "title": "Improper resource management in CODESYS Modbus TCP Server",
    "source": "CERTVDE",
    "references": "https://certvde.com/de/advisories/VDE-2026-042",
    "id": "CVE-2026-35227",
    "bulletinFamily": "",
    "cwe": [
        "CWE-772"
    ],
    "cvelist": null,
    "sourceData": "CODESYS CODESYS Modbus 1.0.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "CODESYS Modbus",
    "version": "1.0.0.0",
    "vendor": "CODESYS",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}