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CVE-2020-7566

Published: Nov 19, 2020Updated: May 29, 2026 Sources: CVE List NVD BDU csafCWE-334
NVD MITRE
7.3CVSSHIGH
EPSS Score
0.3%
Top 79.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-334

Affected Products

Modicon M221, all references, all versionsn/a
modicon m221 firmwareschneider-electricICS / OT / IoT
Modicon M221Schneider ElectricICS / OT / IoT
Modicon M100Schneider ElectricICS / OT / IoT
Modicon M200Schneider ElectricICS / OT / IoT
schneider-electriccommercialFRICS / OT / IoTaka schneider electric se
schneider electriccommercialFRICS / OT / IoTaka schneider-electric

Exploitability

Official Patch Available

References

https://www.se.com/ww/en/download/document/SEVD-2020-315-05/
se.com
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-04
us-cert.cisa.gov
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2020/icsa-20-343-04.json
raw.githubusercontent.com
and 13 more references View all →

Timeline

Published
Nov 19, 2020
Last Updated
May 29, 2026

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