CVE-2018-7830: Schneider Electric Modicom BMXNOR0200H Firmware

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for ~1 minute by sending a specially crafted HTTP request.

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.