Home/CVE/A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, a
CVE

CVE-2018-7856

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, a

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a possible denial of Service when writing invalid memory blocks to the controller over Modbus.

HIGH · CVSS 7.5 EPSS 0.00566
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  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-754Improper Check for Unusual or Exceptional Conditions
▤

Affected Products & Versions

4
schneider-electric modicon premium firmwareall versions
schneider-electric modicon quantum firmwareall versions
schneider-electric modicon m340 firmware< 3.10
schneider-electric modicon m580 firmware< 2.90
⚠

Public Exploits & PoCs

1
pocwww.talosintelligence.com · TALOS-2019-0767www.talosintelligence.com
▣

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 NVD22 May 2019 · 09:29 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-2025-icsa-25-114-01
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/MitigationVendor Advisory
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