CVE-2020-7537

HIGH
7.5
CVSS Score
Published: December 11, 2020 at 12:51 AM UTC
Updated: June 17, 2026 at 03:24 AM UTC
42 products affected across 1 vendorModicon M340 BMXP342020 FirmwareModicon M340 BMXP3420302 FirmwareModicon M340 BMXP341000 Firmware

Using Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions) by N/A?

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.

Affected

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

v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp341000 (same device)
v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342000 (same device)
v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420102 (same device)
v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420102cl (same device)
v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342020 (same device)
v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420302 (same device)
v < 3.30
Affected range stops below 3.30, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420302cl (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmep581020 (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmep582020 (same device)
v < 3.20
Affected range stops below 3.20, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m580-bmep582040 (same device)

Remediation

No guide yet

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

References (1)

CVSS

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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