CVE-2020-7536

HIGH
7.5
CVSS Score
Published: December 11, 2020 at 12:46 AM UTC
Updated: June 17, 2026 at 03:24 AM UTC
21 products affected across 1 vendorModicon M340 BMXP342020 FirmwareModicon M340 BMXP3420302 FirmwareModicon M340 BMXP341000 Firmware

Using Modicon M340 CPUs (BMXP34* versions prior to V3.30) and Modicon M340 Communication Ethernet modules (BMXNOE0100 (H) versions prior to V3.4, BMXNOE0110 (H) versions prior to V6.6, and BMXNOR0200H all versions) by N/A?

Get instant alerts when new vulnerabilities affect Modicon M340 CPUs (BMXP34* versions prior to V3.30) and Modicon M340 Communication Ethernet modules (BMXNOE0100 (H) versions prior to V3.4, BMXNOE0110 (H) versions prior to V6.6, and BMXNOR0200H all versions) - before attackers find them.

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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 M340 CPUs (BMXP34* versions prior to V3.30) Modicon M340 Communication Ethernet modules (BMXNOE0100 (H) versions prior to V3.4 BMXNOE0110 (H) versions prior to V6.6 BMXNOR0200H all versions), that could cause the device to be unreachable when modifying network parameters over SNMP.

Affected

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

v < 3.4
Affected range stops below 3.4, so it looks safe — our inference, not a vendor statement
schneider-electric-bmxnoe0100 (same device)
v < 6.6
Affected range stops below 6.6, so it looks safe — our inference, not a vendor statement
schneider-electric-bmxnoe0110 (same device)
All versions
schneider-electric-bmxnor0200h (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-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)

Remediation

No guide yet

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

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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