CVE-2021-22786

highpriority · track · 30EPSS 0.006 · 50 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.63% (50th) EPSS

CVSS 7.5 · high

Is it mine?

52 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)

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 · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

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

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · cybersecurity@se.comexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/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-200USCWE-200US

affected products (52)

Products and version ranges known to be affected.

Schneider Electric Legacy Modicon Quantum≤ All Versionsenisa_euvdEU
Schneider Electric Modicon M340 CPU (part numbers BMXP34*)All → V3.30enisa_euvdEU
Schneider Electric Modicon M580 CPU (part numbers BMEP* and BMEH*)All → V3.20enisa_euvdEU
Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S)≤ All Versionsenisa_euvdEU
Schneider Electric Modicon MC80 (BMKC80)All → V1.6enisa_euvdEU
Schneider Electric Modicon Momentum CPU (171CBU*)All → V2.3enisa_euvdEU
Schneider Electric Modicon M340≤ 3.40fstec_bduRU
Schneider Electric Modicon M580≤ 4.01fstec_bduRU
Schneider Electric Modicon MC80≤ 1.70fstec_bduRU
Schneider Electric Modicon Momentum MDIall versionsfstec_bduRU
Schneider Electric Modicon Quantumall versionsfstec_bduRU
schneider-electric modicon m340 bmxp341000 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp341000_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342000 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342000_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342010 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342010_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420102 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342020 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342020_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342020h firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342020h_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp342030 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp342030_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420302 firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302_firmware:*:*:*:*:*:*:*:*
schneider-electric modicon m340 bmxp3420302h firmware< 3.40nvdUScpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302h_firmware:*:*:*:*:*:*:*:*

showing 20 of 52

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 2023-02-01modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan