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CVE-2020-7549

Published: Dec 11, 2020Updated: May 28, 2026 Sources: CVE List NVDCWE-754
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
1.0%
Top 41.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause denial of HTTP and FTP services when a series of specially crafted requests is sent to the controller over HTTP.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-754

Affected Products

modicon m340 bmxp341000 firmwareschneider-electricICS / OT / IoT
modicon m340 bmxp342000 firmwareschneider-electricICS / OT / IoT
modicon m340 bmxp3420102 firmwareschneider-electricICS / OT / IoT
modicon m340 bmxp3420102cl firmwareschneider-electricICS / OT / IoT
modicon m340 bmxp342020 firmwareschneider-electricICS / OT / IoT
schneider-electriccommercialFRICS / OT / IoTaka schneider electric se
and 15 more affected products View all →

Exploitability

Official Patch Available

References

https://www.se.com/ww/en/download/document/SEVD-2020-343-06/
se.com

Timeline

Published
Dec 11, 2020
Last Updated
May 28, 2026

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