CVE-2019-6844 — 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 atack on the PLC when upgrading the controller with a firmware package containing an invalid web server image using FTP protocol

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MEDIUM

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 atack on the PLC when upgrading the controller with a firmware package containing an invalid web server image using FTP protocol

Published Oct 29, 2019

4.9

MEDIUM

CVSS 3.1

EPSS 0.96%

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 atack on the PLC when upgrading the controller with a firmware package containing an invalid web server image using FTP protocol.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.96% 0.00959

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.

EPSS probability 0.00959

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 2, 2026	0.96% (0.00959)	60.14th	v5 (v2026.06.15)
Sep 20, 2026	0.96% (0.00959)	59.97th	v5 (v2026.06.15)
Jul 20, 2024	0.08% (0.00081)	35.33th	v3 (v2023.03.01)
Jun 21, 2024	0.08% (0.00081)	35.08th	v3 (v2023.03.01)
Mar 7, 2023	0.08% (0.00081)	33.07th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	5.46% (0.05463)	76.57th	v2 (v2022.01.01)
Feb 3, 2022	2.42% (0.02423)	53.93th	v1
Jan 6, 2022	2.42% (0.02423)	53.48th	v1
Jan 5, 2022	0.55% (0.00550)	33.70th	v5 (v2026.06.15)
Apr 14, 2021	0.55% (0.00550)	0.00th	v1

Weaknesses (1)

CWE-755

References (1)

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

Link	Providers	Tags
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/		x_refsource_MISCVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner schneider

Published Oct 29, 2019

Updated Aug 4, 2024

Reserved Jan 25, 2019

Link CVE-2019-6844

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2019-6844

Red Hat

Severity n/a

Public date n/a

Links CVE-2019-6844