CVE-2019-6856

CVE-2019-6856

Vendor Schneider Electric Se
Product Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions)
Weakness CWE-754
Published January 6, 2020
Last update May 29, 2026

CVSS base score

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 6, 2020 CVE published
May 29, 2026 Record updated