CVE-2020-7536: Schneider Electric BMXNOE0100 Firmware

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

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 products

• Schneider Electric BMXNOE0100 Firmware: before 3.4 (fixed in 3.4)
• Schneider Electric BMXNOE0110 Firmware: before 6.6 (fixed in 6.6)
• Schneider Electric BMXNOR0200H Firmware: any version
• Schneider Electric Modicon m340 BMXP341000 Firmware: before 3.30 (fixed in 3.30)
• Schneider Electric Modicon m340 BMXP342000 Firmware: before 3.30 (fixed in 3.30)
• Schneider Electric Modicon m340 BMXP3420102 Firmware: before 3.30 (fixed in 3.30)
• Schneider Electric Modicon m340 BMXP3420102CL Firmware: before 3.30 (fixed in 3.30)
• Schneider Electric Modicon m340 BMXP342020 Firmware: before 3.30 (fixed in 3.30)
• Schneider Electric Modicon m340 BMXP3420302 Firmware: before 3.30 (fixed in 3.30)
• Schneider Electric Modicon m340 BMXP3420302CL Firmware: before 3.30 (fixed in 3.30)

Published 2020-12-11. Last modified 2026-06-17.