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Vulnerability record · CVE-2020-7564 · published 18 November 2020

CVE-2020-7564: Schneider-electric modicon tsxety4103 firmware classic buffer overflow vulnerability

Schneider Electric · Modicon Tsxety4103 Firmware

A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details) which could cause write access and the execution of commands when uploading a specially crafted file on the controller over FTP.

8.8 CVSS 3.1 High EPSS 1.1% · top 34.3% CWE-120 · Classic buffer overflow
8.8CVSS 3.1 base score, v2 6.5
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details) which could cause write access and the execution of commands when uploading a specially crafted file on the controller over FTP.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

20 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.se.com/ww/en/download/document/SEVD-2020-315-01/ Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-315-01/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-7564), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.