BlackTreeIndependent security intelligence

Full vulnerability report · 2020

CVE-2020-7475High confidence

n/a EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20), Modicon M580 (all versions prior to V3.10) — Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

n/a · EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20), Modicon M580 (all versions prior to V3.10)

9.8CriticalCVSS 3.1

Recommended action

Within 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

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-2020-080-01 · CSAF 2.0 · revision 3.0.0 · finalSchneider Electric CPCERTModicon Controllers, EcoStruxure™ Control Expert and Unity Pro Programming Software

4 known affected

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

Schneider Electric EcoStruxure™ Control Expert all versions prior to V15.0
Schneider Electric Unity Pro all versions
Schneider Electric Modicon M340 all versions prior to V3.20
Schneider Electric Modicon M580 all versions prior to V3.10

Summary: CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), reflective DLL, vulnerability exists, which, if exploited, could allow attackers to transfer malicious code to the controller.
Remediation: After downloading the new version, found in the Download Links section below, all of the following steps are required to remediate the vulnerability: STEP 1: Update software and firmware: • On the engineering workstation: o Recommended remediation: update to EcoStruxure Control Expert V15.0 (Available in the Download Links section) • On the Modicon M340 controller: update to firmware V3.20 or above (Available in the Download Links section) • On the Modicon M580 controller: update to firmware V3.10 or above (Available in the Download Links section) STEP 2: Update projects in Ecostruxure Control Expert by: • Setting up an application password in the project properties • Changing the version of the controller firmware to match the new firmware version of the target controller STEP 3: Rebuild and transfer projects in EcoStruxure Control Expert: • Rebuild all current projects • Transfer them to Modicon controllers STEP 4: Configure the Access Controls on Modicon controllers: • Setup network segmentation and implement a firewall to block all unauthorized access to port 502/TCP

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-2020-28600

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 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available

What, why and how

A CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), reflective DLL, vulnerability exists in EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20), Modicon M580 (all versions prior to V3.10), which, if exploited, could allow attackers to transfer malicious code to the controller.

What

Why

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

How

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

What

Why

How

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 → Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
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-74 ↗
CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'). The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
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:N/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.UINoneUser interaction: No action by another user is required.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-74

Official authority intelligence

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

ENISA EUVD · EUVD-2020-28600Official EUVD mapping

0 linked advisory records.

Official EUVD record

CERT-FR · French · CERTFR-2020-AVI-166Multiples vulnérabilités dans Schneider Electric

De multiples vulnérabilités ont été découvertes dans Schneider Electric . Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance.

Official advisory

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 EcoStruxure™ Control Expert all versions prior to V15.0; Schneider Electric Unity Pro all versions; Schneider Electric Modicon M340 all versions prior to V3.20; Schneider Electric Modicon M580 all versions prior to V3.10
Fixed: Schneider Electric EcoStruxure Control Expert V15.0; Schneider Electric M340 BMXP3420302 and CL and H V3.20 or above; Schneider Electric M340 BMXP342020 and H V3.20 or above; Schneider Electric M340 BMXP342000 V3.20 or above; Schneider Electric M340 BMXP341000 and H V3.20 or above; Schneider Electric M340 BMXP3420102 and CL V3.20 or above; Schneider Electric M340 BMXP3420302 V3.20 or above; Schneider Electric M580 BMEP584040 V3.10 or above; Schneider Electric M580 BMEH584040 and C V3.10 or above; Schneider Electric M580 BMEP586040 and C V3.10 or above; Schneider Electric M580 BMEH586040 and C V3.10 or above; Schneider Electric M580 BMEP581020 and H V3.10 or above; Schneider Electric M580 BMEP582020 and H V3.10 or above; Schneider Electric M580 BMEP582040 and H V3.10 or above; Schneider Electric M580 BMEP583020 V3.10 or above; Schneider Electric M580 BMEP583040 V3.10 or above; Schneider Electric M580 BMEP584020 V3.10 or above; Schneider Electric M580 BMEP585040 and C V3.10 or above; Schneider Electric M580 BMEH582040 and C V3.10 or above; Schneider Electric M580 BMEP584040S BMEH584040S BMEH586040S BMEP582040S V3.10 or above
Action: After downloading the new version, found in the Download Links section below, all of the following steps are required to remediate the vulnerability: STEP 1: Update software and firmware: • On the engineering workstation: o Recommended remediation: update to EcoStruxure Control Expert V15.0 (Available in the Download Links section) • On the Modicon M340 controller: update to firmware V3.20 or above (Available in the Download Links section) • On the Modicon M580 controller: update to firmware V3.10 or above (Available in the Download Links section) STEP 2: Update projects in Ecostruxure Control Expert by: • Setting up an application password in the project properties • Changing the version of the controller firmware to match the new firmware version of the target controller STEP 3: Rebuild and transfer projects in EcoStruxure Control Expert: • Rebuild all current projects • Transfer them to Modicon controllers STEP 4: Configure the Access Controls on Modicon controllers: • Setup network segmentation and implement a firewall to block all unauthorized access to port 502/TCP
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 23 Mar 2020 · Last source change 4 Aug 2024, 09:33 UTC · CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVE recordCVE.org · 5.1

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-2020-28600

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.

2020-03-23CVE published

ENISA EUVD · EUVD-2020-28600↗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.