CVE-2020-7540

highpriority · track · 40OT risk · elevatedEPSS 0.023 · 83 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.32% (83rd) EPSS

CVSS 7.5 · high

Is it mine?

37 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Hsecondary · FSTEC (BDU) RU

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USCWE-306US

affected products (37)

Products and version ranges known to be affected.

n/a Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)≤ Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)enisa_euvdEU
Schneider Electric Modicon M340≤ BMXNOE0110 (H) до 6.5fstec_bduRU
Schneider Electric Modicon M340≤ BMXNOC0401 (H) до 2.10fstec_bduRU
Schneider Electric Modicon M340≤ BMXNOE0100 (H) до 3.3fstec_bduRU
Schneider Electric Modicon M340≤ BMXP34 до 3.30fstec_bduRU
Schneider Electric Modicon Premium≤ TSXETY5103 до 6.4fstec_bduRU
Schneider Electric Modicon Premium≤ BMXNOC0401 до 6.2fstec_bduRU
Schneider Electric Modicon Premium with integrated Ethernet COPRO≤ TSXP576634 до 6.1fstec_bduRU
Schneider Electric Modicon Premium with integrated Ethernet COPRO≤ TSXP575634 до 6.1fstec_bduRU
Schneider Electric Modicon Premium with integrated Ethernet COPRO≤ TSXP574634 до 6.1fstec_bduRU
Schneider Electric Modicon Quantum≤ 140NOC 78x 00 до 1.74fstec_bduRU
Schneider Electric Modicon Quantum≤ 140NOE771x1 до 7.1fstec_bduRU
Schneider Electric Modicon Quantum≤ 140NOC77101 до 1.08fstec_bduRU
Schneider Electric Modicon Quantum with integrated Ethernet COPRO≤ 140CPU65xx0 до 6.1fstec_bduRU
schneider-electric 140cpu65150 firmware< 6.1nvdUScpe:2.3:o:schneider-electric:140cpu65150_firmware:*:*:*:*:*:*:*:*
schneider-electric 140cpu65160 firmware< 6.1nvdUScpe:2.3:o:schneider-electric:140cpu65160_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noc77101 firmware< 1.08nvdUScpe:2.3:o:schneider-electric:140noc77101_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noc78000 firmware< 1.74nvdUScpe:2.3:o:schneider-electric:140noc78000_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noc78100 firmware< 1.74nvdUScpe:2.3:o:schneider-electric:140noc78100_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noe77101 firmware< 7.1nvdUScpe:2.3:o:schneider-electric:140noe77101_firmware:*:*:*:*:*:*:*:*

showing 20 of 37

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-12-11modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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