CVE-2020-7549

mediumpriority · track · 21EPSS 0.011 · 65 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.10% (65th) EPSS

CVSS 5 · medium

Is it mine?

20 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A CWE-754: Improper Check for Unusual or Exceptional Conditions 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 denial of HTTP and FTP services when a series of specially crafted requests is sent to the controller over HTTP.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754US

affected products (20)

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 140cpu65150 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:140cpu65150_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noc78000 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:140noc78000_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noc78100 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:140noc78100_firmware:*:*:*:*:*:*:*:*
schneider-electric 140noe77111 firmware< 7.3nvdUScpe:2.3:o:schneider-electric:140noe77111_firmware:*:*:*:*:*:*:*:*
schneider-electric bmxnoc0401 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:bmxnoc0401_firmware:*:*:*:*:*:*:*:*
schneider-electric bmxnoe0100 firmware< 3.4nvdUScpe:2.3:o:schneider-electric:bmxnoe0100_firmware:*:*:*:*:*:*:*:*
schneider-electric bmxnoe0110 firmware< 6.6nvdUScpe:2.3:o:schneider-electric:bmxnoe0110_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp341000 firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp341000_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342000 firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342000_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420102 firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420102cl firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102cl_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342020 firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342020_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420302 firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420302cl firmware< 3.30nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302cl_firmware:*:*:*:*:*:*:*:*
schneider-electric tsxety4103 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:tsxety4103_firmware:*:*:*:*:*:*:*:*
schneider-electric tsxety5103 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:tsxety5103_firmware:*:*:*:*:*:*:*:*
schneider-electric tsxp574634 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:tsxp574634_firmware:*:*:*:*:*:*:*:*
schneider-electric tsxp575634 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:tsxp575634_firmware:*:*:*:*:*:*:*:*
schneider-electric tsxp576634 firmwareall versionsnvdUScpe:2.3:o:schneider-electric:tsxp576634_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

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

references (3)

External citations — patches, advisories, analysis.

scry

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