What’s Vulnerable › Vulnerabilities

CVE-2020-7566

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-19 · updated 2026-06-17
• Weakness: CWE-334

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.

Affected products

• Modicon M221, all references, all versions: all versions

References

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

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