CVE-2018-7821

HIGH
7.5
CVSS Score
Published: May 22, 2019 at 07:36 PM UTC
Updated: June 17, 2026 at 02:03 AM UTC
3 products affected across 1 vendorModicon M221 FirmwareModicon M221Somachine Basic

Using SoMachine Basic and Modicon M221, SoMachine Basic, all versions Modicon M221, all references, all versions prior to firmware V1.10.0.0 by N/A?

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.10.0.0
Affected range stops below 1.10.0.0, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m221 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770CWE-400

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