CVE-2020-7564

Name: CVE-2020-7564
Creator: NVD / NIST
Published: 2020-11-18T14:15:13.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2020-7564 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.09%

61.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicon Tsxety4103 Firmware	All versions
Schneider-Electric	Modicon Tsxety5103 Firmware	All versions
Schneider-Electric	Modicon Tsxp574634 Firmware	All versions
Schneider-Electric	Modicon Tsxp575634 Firmware	All versions
Schneider-Electric	Modicon Tsxp576634 Firmware	All versions
Schneider-Electric	Modicon Quantum 140noe77101 Firmware	All versions
Schneider-Electric	Modicon Quantum 140noe77111 Firmware	All versions
Schneider-Electric	Modicon Quantum 140noc78100 Firmware	All versions
Schneider-Electric	Modicon Quantum 140cpu65150 Firmware	All versions
Schneider-Electric	Modicon Quantum 140cpu65150c Firmware	All versions
Schneider-Electric	Modicon Quantum 140cpu65160c Firmware	All versions
Schneider-Electric	Modicon Quantum 140cpu65160 Firmware	All versions
Schneider-Electric	Modicon M340 Bmx P34-2010 Firmware	All versions
Schneider-Electric	Modicon M340 Bmx P34-2030 Firmware	All versions
Schneider-Electric	Modicon M340 Bmx Noc 0401 Firmware	All versions
Schneider-Electric	Modicon M340 Bmx Noe 0100 Firmware	All versions
Schneider-Electric	Modicon M340 Bmx Noe 0100h Firmware	All versions
Schneider-Electric	Modicon M340 Bmx Noe 0110 Firmware	All versions
Schneider-Electric	Modicon M340 Bmx Noe 0110h Firmware	All versions
Schneider-Electric	Modicon M340 Bmx Nor 0200h Firmware	All versions

References

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

Timeline

Published: Nov 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7564?

How severe is CVE-2020-7564?

CVE-2020-7564 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7564?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7564?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST