Home/CVE/A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modi
CVE

CVE-2019-6856

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modi

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 writing specific physical memory blocks using Modbus TCP.

HIGH · CVSS 7.5 EPSS 0.00491
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-754Improper Check for Unusual or Exceptional Conditions
CWE-754Improper Check for Unusual or Exceptional Conditions
▤

Affected Products & Versions

29
schneider-electric modicon m580 firmware< 2.80
schneider-electric modicon m340 firmware< 3.01
schneider-electric tsxh5744m firmware< 3.20
schneider-electric tsxh5724m firmware< 3.20
schneider-electric tsxp576634m firmware< 3.20
schneider-electric tsxp57554m firmware< 3.20
schneider-electric tsxp575634m firmware< 3.20
schneider-electric tsxp57454m firmware< 3.20
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cybersecurity@se.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Jan 2020 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2020-icsa-20-016-01
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.se.com/ww/en/download/document/SEVD-2019-344-01Vendor Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-016-01Third Party AdvisoryUS Government Resource
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