CVE-2019-6855

highpriority · track · 29OT risk · elevatedEPSS 0.010 · 61 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.95% (61st) EPSS

CVSS 7.5 · high

Is it mine?

27 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Incorrect Authorization 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) , and Modicon M580 (all versions prior to V3.10), which could cause a bypass of the authentication process between EcoStruxure Control Expert and the M340 and M580 controllers.

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 · 6.7–7.5

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

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 3.4

v3.17.3highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.16.7mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USprimaryCWE-285USCWE-863US

affected products (27)

Products and version ranges known to be affected.

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) , and Modicon M580 (all versions prior to V3.10)≤ EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20) , and Modicon M580 (all versions prior to V3.10)enisa_euvdEU
Schneider Electric EcoStruxure Control Expert≤ 14.1 Hot Fixfstec_bduRU
Schneider Electric Unity Proall versionsfstec_bduRU
schneider-electric ecostruxure control expert< 14.1nvdUScpe:2.3:a:schneider-electric:ecostruxure_control_expert:*:*:*:*:*:*:*:*
schneider-electric ecostruxure control expert= 14.1nvdUScpe:2.3:a:schneider-electric:ecostruxure_control_expert:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp341000 firmware< 3.20nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp341000_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342000 firmware< 3.20nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342000_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420102 firmware< 3.20nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342020 firmware< 3.20nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342020_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420302 firmware< 3.20nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmeh582040 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmeh582040_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmeh584040 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmeh584040_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmeh584040s firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmeh584040s_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmeh586040 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmeh586040_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmeh586040s firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmeh586040s_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmep581020 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmep581020_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmep582020 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmep582020_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmep582040 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmep582040_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmep582040s firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmep582040s_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m580 bmep583020 firmware< 3.10nvdUScpe:2.3:o:schneider-electric:modicon_m580_bmep583020_firmware:*:*:*:*:*:*:*:*

showing 20 of 27

also known as (5)

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 2020-01-06modified 2026-06-17

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+5006 more

references (5)

External citations — patches, advisories, analysis.

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