CVE-2019-6857

high-risk

Published 2020-01-06

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 of the controller when reading specific memory blocks using Modbus TCP.

Do I need to act?

0.49% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (20)

Modicon M580 Firmware

Modicon M340 Firmware

Tsxh5744M Firmware

Tsxh5724M Firmware

Tsxp576634M Firmware

Tsxp57554M Firmware

Tsxp575634M Firmware

Tsxp57454M Firmware

Tsxp574634M Firmware

Tsxp57354M Firmware

Tsxp573634M Firmware

Tsxp57304M Firmware

Tsxp57254M Firmware

Tsxp572634M Firmware

Tsxp57204M Firmware

Tsxp571634M Firmware

Tsxp57154M Firmware

Tsxp57104M Firmware

140Cpu65150 Firmware

140Cpu65160 Firmware

Affected Vendors

Schneider-Electric

References (4)

Vendor Advisory https://www.se.com/ww/en/download/document/SEVD-2019-344-01

Third Party Advisory https://www.us-cert.gov/ics/advisories/icsa-20-016-01

Vendor Advisory https://www.se.com/ww/en/download/document/SEVD-2019-344-01

Third Party Advisory https://www.us-cert.gov/ics/advisories/icsa-20-016-01

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high-risk

Severity 26/34 · High

Exploitability 2/34 · Minimal

Exposure 22/34 · High