CVE-2018-7789

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Summary

CVECVE-2018-7789
StatePUBLISHED
Assignerschneider
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-08-29 20:29:00 UTC
Updated2026-05-29 15:16:16 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.007920000 probability, percentile 0.742230000 (date 2026-06-02)

Problem Types: CWE-754 | Improper Check for Unusual or Exceptional Conditions | CWE-754 CWE-754 Improper Check for Unusual or Exceptional Conditions

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1ADPDECLARED4.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
2.0[email protected]Primary7.8AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:N/AC:L/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Schneider-electric Modicon M221 - All All All
Operating System Schneider-electric Modicon M221 Firmware All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Schneider Electric SE Modicon M221 All References All Versions Prior To Firmware V1.6.2.0 affected Modicon M221, all references, all versions prior to firmware V1.6.2.0 Not specified

References

ReferenceSourceLinkTags
Security Notification - Modicon M221 | Schneider Electric af854a3a-2127-422b-91ae-364da2661108 www.schneider-electric.com Mitigation, Vendor Advisory
Schneider Electric Modicon M221 | ICS-CERT af854a3a-2127-422b-91ae-364da2661108 ics-cert.us-cert.gov Mitigation, Third Party Advisory, US Government Resource
Malformed Request af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 590483 Schneider Electric Modicon M221 Multiple Vulnerabilities (ICSA-18-240-02,ICSA-18-240-01)
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