VULNERABILITY INTELLIGENCE

CVE-2020-7566

CVSS score7.3 HIGH

EPSS probability0.29%

CISA KEVNot currently listed

Published2020-11-19

Last modified2026-06-17

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

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.

Weakness classification

cybersecurity@se.com: CWE-334

Primary references

cybersecurity@se.com — Third Party Advisory, US Government Resource
cybersecurity@se.com — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory