CVE-2018-7794 (GCVE-0-2018-7794)

Vulnerability from cvelistv5 – Published: 2020-01-06 22:57 – Updated: 2026-05-29 14:05
VLAI
Summary
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions) which could cause a Denial of Service when reading data with invalid index using Modbus TCP.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
Impacted products
Vendor Product Version
Schneider Electric SE Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions) Affected: Modicon M580
Affected: Modicon M340
Affected: Modicon Quantum
Affected: Modicon Premium (see security notification for specific versions)
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      "id": "CVE-2018-7794",
      "lastModified": "2024-11-21T04:12:44.850",
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      "published": "2020-01-06T23:15:10.893",
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      "cveMetadata": "{\"assignerOrgId\": \"076d1eb6-cfab-4401-b34d-6dfc2a413bdb\", \"assignerShortName\": \"schneider\", \"cveId\": \"CVE-2018-7794\", \"datePublished\": \"2020-01-06T22:57:09.000Z\", \"dateReserved\": \"2018-03-08T00:00:00.000Z\", \"dateUpdated\": \"2026-05-29T14:05:11.611Z\", \"state\": \"PUBLISHED\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.