Vulnerability Monitor

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CVE-2020-7536

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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 20 products from schneider-electric, from schneider-electric, from schneider-electric and 17 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-12-11T01:15:12.190

Last Modified

2024-11-21T05:37:20.047

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

10.0

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-754
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System schneider-electric modicon_m340_bmxp341000_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp341000 - No
Operating System schneider-electric modicon_m340_bmxp342000_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp342000 - No
Operating System schneider-electric modicon_m340_bmxp3420102_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp3420102 - No
Operating System schneider-electric modicon_m340_bmxp3420102cl_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp3420102cl - No
Operating System schneider-electric modicon_m340_bmxp342020_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp342020 - No
Operating System schneider-electric modicon_m340_bmxp3420302_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp3420302 - No
Operating System schneider-electric modicon_m340_bmxp3420302cl_firmware < 3.30 Yes
Hardware schneider-electric modicon_m340_bmxp3420302cl - No
Operating System schneider-electric bmxnoe0100_firmware < 3.4 Yes
Hardware schneider-electric bmxnoe0100 - No
Operating System schneider-electric bmxnoe0110_firmware < 6.6 Yes
Hardware schneider-electric bmxnoe0110 - No
Operating System schneider-electric bmxnor0200h_firmware * Yes
Hardware schneider-electric bmxnor0200h - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For schneider-electric's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.