CVE-2019-6842

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-10-29 · updated 2026-06-17
Weakness: CWE-755

Description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with a missing web server image inside the package using FTP protocol.

Affected products

Schneider-Electric Modicon 140Cra Firmware: all versions
Schneider-Electric Modicon Bmxcra Firmware: all versions
Schneider-Electric Modicon M340 Firmware: all versions
Schneider Electric SE Modicon M580: all versions

References

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

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