Home/CVE/A CWE-334: Small Space of Random Values vulnerability exists in Modicon M221 (all references, all versions) that could a
CVE

CVE-2020-7566

A CWE-334: Small Space of Random Values vulnerability exists in Modicon M221 (all references, all versions) that could a

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.

HIGH · CVSS 7.3 EPSS 0.00046
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-334Small Space of Random Values
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Affected Products & Versions

1
schneider-electric modicon m221 firmwareall versions
▣

Scoring & Timeline

7.3
HIGH · CVSS v3.1 · cybersecurity@se.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Nov 2020 · 10:15 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
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Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2020-icsa-20-343-04
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-04Third Party AdvisoryUS Government Resource
https://www.se.com/ww/en/download/document/SEVD-2020-315-05/Vendor Advisory
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