CVE-2019-6841

moderate-risk

Published 2019-10-29

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with no firmware image inside the package using FTP protocol.

Do I need to act?

0.50% 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 4.9/10 Medium

NETWORK / LOW complexity

Affected Products (4)

Modicon M580 Firmware

Modicon M340 Firmware

Modicon Bmxcra Firmware

Modicon 140Cra Firmware

Affected Vendors

Schneider-Electric

References (2)

Vendor Advisory https://www.se.com/ww/en/download/document/SEVD-2019-281-02/

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moderate-risk

Severity 20/34 · Moderate

Exploitability 2/34 · Minimal

Exposure 10/34 · Low