CVE-2019-6819

HIGH
7.5
CVSS Score
Published: May 22, 2019 at 07:45 PM UTC
Updated: June 17, 2026 at 02:39 AM UTC
40 products affected across 1 vendorModicon M580 FirmwareModicon M340 FirmwareModicon Quantum Firmware

Using 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 by N/A?

Get instant alerts when new vulnerabilities affect 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 - before attackers find them.

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.01
Affected range stops below 3.01, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp341000 (same device) · schneider-electric-modicon-m340-bmxp341000h (same device) · schneider-electric-modicon-m340-bmxp342000 (same device) · schneider-electric-modicon-m340-bmxp3420102 (same device) · schneider-electric-modicon-m340-bmxp3420102cl (same device) · schneider-electric-modicon-m340-bmxp342020 (same device) · schneider-electric-modicon-m340-bmxp342020h (same device) · schneider-electric-modicon-m340-bmxp3420302 (same device) · schneider-electric-modicon-m340-bmxp3420302cl (same device) · schneider-electric-modicon-m340-bmxp3420302h (same device)
v < 2.80
Affected range stops below 2.80, so it looks safe — our inference, not a vendor statement
schneider-electric-bmeh582040 (environment) · schneider-electric-bmeh582040c (environment) · schneider-electric-bmeh584040 (environment) · schneider-electric-bmeh584040c (environment) · schneider-electric-bmeh586040 (environment) · schneider-electric-bmeh586040c (environment) · schneider-electric-modicon-m580-bmep581020 (same device) · schneider-electric-modicon-m580-bmep581020h (same device) · schneider-electric-modicon-m580-bmep582020 (same device) · schneider-electric-modicon-m580-bmep582020h (same device) · schneider-electric-modicon-m580-bmep582040 (same device) · schneider-electric-modicon-m580-bmep582040h (same device) · schneider-electric-modicon-m580-bmep582040s (same device) · schneider-electric-modicon-m580-bmep583020 (same device) · schneider-electric-modicon-m580-bmep583040 (same device) · schneider-electric-modicon-m580-bmep584020 (same device) · schneider-electric-modicon-m580-bmep584040 (same device) · schneider-electric-modicon-m580-bmep584040s (same device) · schneider-electric-modicon-m580-bmep585040 (same device) · schneider-electric-modicon-m580-bmep585040c (same device) · schneider-electric-modicon-m580-bmep586040 (same device) · schneider-electric-modicon-m580-bmep586040c (same device)
All versions
schneider-electric-modicon-premium (same device)
All versions
schneider-electric-modicon-quantum (same device)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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