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Fencer Intel
high 7.5

CVE-2019-6819 json

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists which could cause a possible Denial of Service when sp…

published 7y ago modified 4mo ago also EUVD-2019-16373

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists which could cause a possible Denial of Service when specific Modbus frames are sent to the controller in the products: Modicon M340 - firmware versions prior to V3.01, Modicon M580 - firmware versions prior to V2.80, All firmware versions of Modicon Quantum and Modicon Premium.

Patch / fix

  • schneider-electric modicon_m340_firmware 3.01
  • schneider-electric modicon_m580_firmware 2.80

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-183-01 updated cvss 7.5

Schneider Electric Modicon Controllers

  • Schneider Electric Software, LLC Modicon M340 < 3.01 Schneider Electric Software, LLC Modicon M580 < 2.80 Schneider Electric Software, LLC Modicon Premium Schneider Electric Software, LLC Modicon Quantum
    affected: vendor fix, mitigation “Schneider Electric has recommended the following to mitigate this vulnerability.” schneider-electric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5mo ago

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a Modicon Controllers, Modicon M340 - firmware versions prior to V3.01 Modicon M580 - firmware versions prior to V2.80 All firmware versions of Modicon Quantum and Modicon Premium

Classification

Weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.