CVE-2020-7543

HIGH

Modicon M580 and M340 Firmware < 3.20 - Denial of Service via Crafted Modbus Read Physical Memory Request

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0039
EPSS Percentile 60.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-754
Status published
Products (16)
schneider-electric/modicon_m340_bmxp341000_firmware < 3.30
schneider-electric/modicon_m340_bmxp342000_firmware < 3.30
schneider-electric/modicon_m340_bmxp3420102_firmware < 3.30
schneider-electric/modicon_m340_bmxp3420102cl_firmware < 3.30
schneider-electric/modicon_m340_bmxp342020_firmware < 3.30
schneider-electric/modicon_m340_bmxp3420302_firmware < 3.30
schneider-electric/modicon_m340_bmxp3420302cl_firmware < 3.30
schneider-electric/modicon_m580_bmep581020_firmware < 3.20
schneider-electric/modicon_m580_bmep582020_firmware < 3.20
schneider-electric/modicon_m580_bmep582040_firmware < 3.20
... and 6 more
Published Dec 11, 2020
Tracked Since Feb 18, 2026