CVE-2018-7831: Schneider Electric Modicom BMXNOR0200H Firmware

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to send a specially crafted URL to a currently authenticated web server user to execute a password change on the web server.

Affected products

• Schneider Electric Modicom BMXNOR0200H Firmware: any version
• Schneider Electric Modicom m340 Firmware: any version
• Schneider Electric Modicom Premium Firmware: any version
• Schneider Electric Modicom Quantum Firmware: any version

Published 2018-11-30. Last modified 2026-06-17.