CVE-2020-7540: Schneider Electric 140cpu65150 Firmware

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.

Affected products

• Schneider Electric 140cpu65150 Firmware: before 6.1 (fixed in 6.1)
• Schneider Electric 140cpu65160 Firmware: before 6.1 (fixed in 6.1)
• Schneider Electric 140noc77101 Firmware: before 1.08 (fixed in 1.08)
• Schneider Electric 140noc78000 Firmware: before 1.74 (fixed in 1.74)
• Schneider Electric 140noc78100 Firmware: before 1.74 (fixed in 1.74)
• Schneider Electric 140noe77101 Firmware: before 7.1 (fixed in 7.1)
• Schneider Electric 140noe77111 Firmware: before 7.1 (fixed in 7.1)
• Schneider Electric BMXNOC0401 Firmware: before 2.10 (fixed in 2.10)
• Schneider Electric BMXNOE0100 Firmware: before 3.3 (fixed in 3.3)
• Schneider Electric BMXNOE0110 Firmware: before 6.5 (fixed in 6.5)
• Schneider Electric BMXNOR200H 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)
• Schneider Electric TSXETY4103 Firmware: before 6.2 (fixed in 6.2)
• Schneider Electric TSXETY5103 Firmware: before 6.4 (fixed in 6.4)
• Schneider Electric TSXP574634 Firmware: before 6.1 (fixed in 6.1)
• Schneider Electric TSXP575634 Firmware: before 6.1 (fixed in 6.1)
• Schneider Electric TSXP576634 Firmware: before 6.1 (fixed in 6.1)

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