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Vulnerability record · CVE-2019-6813 · published 17 September 2019

CVE-2019-6813: Schneider-electric modicon m340 firmware vulnerability

Schneider Electric · Modicon M340 Firmware

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in BMXNOR0200H Ethernet / Serial RTU module (all firmware versions) and Modicon M340 controller (all firmware versions), which could cause denial of service when truncated SNMP packets on port 161/UDP are received by the device.

7.5 CVSS 3.1 High EPSS 2.1% · top 18.8% CWE-754 · CWE-754
7.5CVSS 3.1 base score, v2 7.8
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in BMXNOR0200H Ethernet / Serial RTU module (all firmware versions) and Modicon M340 controller (all firmware versions), which could cause denial of service when truncated SNMP packets on port 161/UDP are received by the device.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://security.cse.iitk.ac.in/responsible-disclosure Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-225-02/ Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-225-03/ Vendor Advisory
https://security.cse.iitk.ac.in/responsible-disclosure Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-225-02/ Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-225-03/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-6813), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.