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Full vulnerability report · 2022
CVE-2020-7534High confidence

n/a Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) — Cross-Site Request Forgery (CSRF)

n/a · Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103)

8.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SEVD-2022-011-01 · CSAF 2.0 · revision 1 · finalSchneider Electric CPCERTEthernet and Web server on Modicon M340 controller and Communication Modules
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • Schneider Electric Modicon M340 CPUs all
  • Schneider Electric Modicon Quantum CPUs with integrated Ethernet (Copro) all
  • Schneider Electric Modicon Premium CPUs with integrated Ethernet (Copro) all
  • Schneider Electric Modicon M340 ethernet modules all
  • Schneider Electric Modicon Quantum and Premium factory cast communication modules all
Summary
A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, that could cause a leak of sensitive data or unauthorized actions on the web server during the time the user is logged in.
Remediation
Customers should immediately apply the following mitigations to reduce the risk of exploit. For further details please check the Cyber Security Reference Manual available here: Modicon Controllers Platform - Cyber Security, Reference Manual User guide | Schneider Electric • Setup a VPN between the Modicon PLC modules and the engineering workstation containing EcoStruxure Control Expert or EcoStruxure Process Expert. For the M340 offer, the recommended configuration is described in the section “How to protect M340 architectures with EAGLE40 using a VPN” of the EcoStruxure Control Expert online help. • Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual” in chapter “Messaging Configuration Parameters”: https://www.se.com/ww/en/download/document/31007131K010 00/ • Setup network segmentation and configure a firewall to block all unauthorized access to TCP ports 502 and 80 • Disable the HTTP service and other communications services (FTP, SMTP, etc.) when not needed or restrict access to authorized users Please note these mitigations may not be sufficient on older product firmware versions. Products must be updated to the most current version available: • M340 CPU v3.40 : https://www.se.com/ww/en/download/document/BMXP34xxxxx_ SV_xx.xx/ • Quantum 140CPU65xxx Copro v6.1 : https://www.se.com/fr/fr/download/document/140CPU65260+Qu antum+Copro+Exec+and+Release+Notes/ • Premium TSXP57xxx Copro v6.1: TSXP574634M Ethernet Copro Firmware | Schneider Electric (se.com)
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-28659

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, that could cause a leak of sensitive data or unauthorized actions on the web server during the time the user is logged in. Affected Products: Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) (All Versions)

What

A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, that could cause a leak of sensitive data or unauthorized actions on the web server during the time the user is logged in. Affected Products: Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) (All Versions)

Why

The application accepts a state-changing browser request without a reliable anti-forgery check.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, that could cause a leak of sensitive data or unauthorized actions on the web server during the time the user is logged in. Affected Products: Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) (All Versions)

Why

The application accepts a state-changing browser request without a reliable anti-forgery check.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Cross-Site Request Forgery (CSRF) → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-352 ↗

CWE-352: Cross-Site Request Forgery (CSRF). The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-352
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

CERT-FR · French · CERTFR-2022-AVI-017Multiples vulnérabilités dans les produits Schneider

Bulletin de sécurité Schneider SEVD-2022-011-04 du 11 janvier 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-04 Bulletin de sécurité Schneider SEVD-2022-011-05 du 11 janvier 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-05 Bulletin de sécurité Schneider SEVD-2022-011-06 du 11 janvier 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-06 Bulletin de sécurité Schneider SEVD-2022-011-07 du 11 janvier 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-07 Référence CVE CVE-2019-8963 https://www.cve.org/CVERecord?id=CVE-2019-8963 Référence CVE CVE-2020-7534 https://www.cve.org/CVERecord?id=CVE-2020-7534 Référence CVE CVE-2020-8597 https://www.cve.org/CVERecord?id=CVE-2020-8597 Référence CVE CVE-2021-21863 https://www.cve.org/CVERecord?id=CVE-2021-21863 Référence CVE CVE-2021-21864 https://www.cve.org/CVERecord?id=CVE-2021-21864 Référence CVE CVE-2021-21865 https://www.cve.org/CVERecord?id=CVE-2021-21865 Référence CVE CVE-2021-21866 https://www.cve.org/CVERecord?id=CVE-2021-21866 Référence CVE CVE-2021-21867 https://www.cve.org/CVERecord?id=CVE-2021-21867 Référence CVE CVE-2021-21868 https://www.cve.org/CVERecord?id=CVE-2021-21868 Référence CVE CVE-2021-21869 https://www.cve.org/CVERecord?id=CVE

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Schneider Electric Modicon M340 CPUs all; Schneider Electric Modicon Quantum CPUs with integrated Ethernet (Copro) all; Schneider Electric Modicon Premium CPUs with integrated Ethernet (Copro) all; Schneider Electric Modicon M340 ethernet modules all; Schneider Electric Modicon Quantum and Premium factory cast communication modules all
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
Customers should immediately apply the following mitigations to reduce the risk of exploit. For further details please check the Cyber Security Reference Manual available here: Modicon Controllers Platform - Cyber Security, Reference Manual User guide | Schneider Electric • Setup a VPN between the Modicon PLC modules and the engineering workstation containing EcoStruxure Control Expert or EcoStruxure Process Expert. For the M340 offer, the recommended configuration is described in the section “How to protect M340 architectures with EAGLE40 using a VPN” of the EcoStruxure Control Expert online help. • Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual” in chapter “Messaging Configuration Parameters”: https://www.se.com/ww/en/download/document/31007131K010 00/ • Setup network segmentation and configure a firewall to block all unauthorized access to TCP ports 502 and 80 • Disable the HTTP service and other communications services (FTP, SMTP, etc.) when not needed or restrict access to authorized users Please note these mitigations may not be sufficient on older product firmware versions. Products must be updated to the most current version available: • M340 CPU v3.40 : https://www.se.com/ww/en/download/document/BMXP34xxxxx_ SV_xx.xx/ • Quantum 140CPU65xxx Copro v6.1 : https://www.se.com/fr/fr/download/document/140CPU65260+Qu antum+Copro+Exec+and+Release+Notes/ • Premium TSXP57xxx Copro v6.1: TSXP574634M Ethernet Copro Firmware | Schneider Electric (se.com)
04

Evidence and provenance

Published 4 Feb 2022 · Last source change 28 May 2026, 20:42 UTC · CWE-352 · Cross-Site Request Forgery (CSRF)

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2020-28659
Product sourceVendor CSAF · Schneider Electric CPCERT
Remediation sourceVendor CSAF · Schneider Electric CPCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2020-28659↗Vendor CSAF · Schneider Electric CPCERT↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-7534 · cve.blacktree.nl