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Vulnerability record · CVE-2018-7821 · published 22 May 2019

CVE-2018-7821: Schneider-electric somachine basic allocation without limits vulnerability

Schneider Electric · Somachine Basic

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.

7.5 CVSS 3.1 High EPSS 1.1% · top 35.8% CWE-770 · Allocation without limitsCWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score, v2 5.0
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-7821), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.