CVE-2018-7789

HIGH
7.5
CVSS Score
Published: August 29, 2018 at 08:00 PM UTC
Updated: June 17, 2026 at 02:03 AM UTC
3 products affected across 1 vendorModicon M221 FirmwareModicon M221Electric Modicon M221

Using Modicon M221, all references, all versions prior to firmware V1.6.2.0 by Schneider Electric SE?

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Severity
HIGH7.5
Exploit prediction
EPSS 3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.6.2.0
Affected range stops below 1.6.2.0, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m221 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/105171
x_refsource_MISCMitigationThird Party AdvisoryUS Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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