CVE-2018-7821 - Vulnerability Details - OpenCVE

An Environment (CWE-2) vulnerability exists in SoMachine Basic, all versions, and Modicon M221(all references, all versions prior to firmware V1.10.0.0) which could cause cycle time impact when flooding the M221 ethernet interface while the Ethernet/IP adapter is activated.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Schneider-electric	Modicon M221 Modicon M221 Firmware Somachine Basic

Configuration 1 [-]

cpe:2.3:a:schneider-electric:somachine_basic:*:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:schneider-electric:modicon_m221:-:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/

History

Fri, 29 May 2026 15:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-400
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: schneider

Published: 2019-05-22T19:36:47.000Z

Updated: 2026-05-29T14:12:29.726Z

Reserved: 2018-03-08T00:00:00.000Z

Link: CVE-2018-7821

Vulnrichment

Updated: 2024-08-05T06:37:59.137Z

NVD

Status : Modified

Published: 2019-05-22T20:29:01.043

Modified: 2026-05-29T15:16:17.167

Link: CVE-2018-7821

Redhat

No data.

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