CVE•Published 2020-11-18•Modified 2026-05-29•1 article on news•5 live references•NVD data

CVE-2020-7564Schneider-electric · Modicon_tsxety4103_firmware

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 21% of all CVEs

Weaknesses (CWE)

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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.

Timeline

Published 2020-11-18

Modified 2026-05-29

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2020-7564

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · OS

os:"Modicon Tsxety4103 Firmware"

Hosts Shodan identified as running Modicon Tsxety4103 Firmware.

More intel sources (5)

Shodan report

vuln:CVE-2020-7564

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2020-7564