CVE-2018-7789

highpriority · track · 31EPSS 0.028 · 86 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.80% (86th) EPSS

CVSS 7.8 · high

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

An Improper Check for Unusual or Exceptional Conditions vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to remotely reboot Modicon M221 using crafted programing protocol frames.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedModicon M221cisa_csaf_ot
Schneider Electric reports that a fix for this vulnerability is implemented in Modicon M221 Firmware v1.6.2.0, delivered within SoMachine Basic v1.6 SP2, or by using the Schneider Electric Software Update tool.
MitigationModicon M221cisa_csaf_ot
For more information, see the Schneider Electric security notification at:
https://www.schneider-electric.com/en/download/document/SEVD-2018-233-01/

cvss

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

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.8–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

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

v3.04.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Lsecondary · CISA US

v3.16.5mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Lsecondary · ENISA EU

v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Lsecondaryexploitability 2.2 · impact 2.5

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USprimaryCWE-754USCWE-754US

affected products (5)

Products and version ranges known to be affected.

Modicon M221: all references and versions prior to firmware v1.6.2.0all versionscisa_csaf_otUS
Schneider Electric Software, LLC Modicon M221< 1.6.2.0cisa_csaf_otUS
Schneider Electric SE Modicon M221, all references, all versions prior to firmware V1.6.2.0≤ Modicon M221, all references, all versions prior to firmware V1.6.2.0enisa_euvdEU
Schneider Electric Modicon M221≤ 1.6.2.0fstec_bduRU
schneider-electric modicon m221 firmware< 1.6.2.0nvdUScpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-18-240-02Schneider Electric Modicon M2212018-08-28icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow an unauthorized user to remotely reboot the device.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2018-08-29modified 2026-06-17

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+777 more

references (9)

External citations — patches, advisories, analysis.

https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02 cnnvd
https://www.schneider-electric.com/en/download/document/SEVD-2018-233-01/cnnvd
https://www.securityfocus.com/bid/105171 cnnvd
http://www.securityfocus.com/bid/105171 enisa_euvd
https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02 enisa_euvd
https://www.schneider-electric.com/en/download/document/SEVD-2018-233-01/enisa_euvd
http://www.securityfocus.com/bid/105171Third Party AdvisoryVDB Entrynvd
https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02MitigationThird Party AdvisoryUS Government Resourcenvd

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