No exploitation reported

CVE-2020-7564

No exploitation reported by the sources we read.

Published2020-11-18
WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

dates in UTC

2020-11-1814:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-7564?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-7564?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Schneider-electric modicon m340 bmx noc 0401 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Schneider-electric modicon m340 bmx noe 0100 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Schneider-electric modicon m340 bmx noe 0100h firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

17 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-005-01 CISA12 known affected
Schneider Electric Web Server on Modicon M340
M340 Communication Ethernet modules BMX NOE 0100 (H): all versions · M340 Communication Ethernet modules BMX NOE 0110 (H): all versions · Quantum communication modules 140NOC78x00: all versions · +9 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-21-005-01 · 12 productsSchneider Electric is establishing a remediation plan to fix these vulnerabilities in current and future versions of Modicon PAC controllers. Schneider Electric will update SEVD-2020-315-01 when the remediation is available.
Mitigation from the vendor CISA ICSA-21-005-01 · 12 productsDisable FTP via UnityPro / Ecostruxure Control Expert. This is disabled by default when a new application is created.
Mitigation from the vendor CISA ICSA-21-005-01 · 12 productsConfigure the access control list via Ecostruxure Control Expert programming tool.
Mitigation from the vendor CISA ICSA-21-005-01 · 12 productsSet up network segmentation and implement a firewall to block all unauthorized access to Port 21/TCP.
Mitigation from the vendor CISA ICSA-21-005-01 · 12 productsSchneider Electric's Modicon Premium and Modicon Quantum controllers have reached their end of life and are no longer commercially available. They have been replaced by the Modicon M580 ePAC controller.
Mitigation from the vendor CISA ICSA-21-005-01 · 12 productsFor further information please refer to Modicon Controllers Platform - CyberSecurity, Reference Manual and SEVD-2020-315-01

Advisories and patches

www.se.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-05-29
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.16.32026-05-29
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
CNAweakness (CWE)CWE-120read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2020-11-18
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-7564?

Is CVE-2020-7564 actively exploited?

Active exploitation of CVE-2020-7564 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-7564?

CVE-2020-7564 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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