CVE-2020-7549 - 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

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HIGH

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

Published Dec 11, 2020

7.5

HIGH

CVSS 3.1

EPSS 1.08%

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.

Affected products

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-754

References (1)

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

Link	Providers	Tags
https://www.se.com/ww/en/download/document/SEVD-2020-343-06/		x_refsource_CONFIRMVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner schneider

Published Dec 11, 2020

Updated May 28, 2026

Reserved Jan 21, 2020

Link CVE-2020-7549

CISA Vulnrichment

Updated May 28, 2026

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-7549

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-7549