CVE-2020-7566

State: Published
Severity: 7.1 High
Published: Nov 19, 2020
Updated: May 29, 2026
Reserved: Jan 21, 2020

Description

A CWE-334: Small Space of Random Values vulnerability exists in Modicon M221 (all references, all versions) that could allow the attacker to break the encryption keys when the attacker has captured the traffic between EcoStruxure Machine - Basic software and Modicon M221 controller.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-334 Small Space of Random ValuesÊ

Affected Products

Product	Versions
Modicon M221, all references, all versionsn/a	Modicon M221, all references, all versionsAffected

References

https://www.se.com/ww/en/download/document/SEVD-2020-315-05/
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-04

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