CVE-2019-6811: Schneider Electric Modicon Quantum 140noe77101 Firmware

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An Improper Check for Unusual or Exceptional Conditions (CWE-754) vulnerability exists in Modicon Quantum 140 NOE771x1 version 6.9 and earlier, which could cause denial of service when the module receives an IP fragmented packet with a length greater than 65535 bytes. The module then requires a power cycle to recover.

Affected products

• Schneider Electric Modicon Quantum 140noe77101 Firmware: up to and including 6.9
• Schneider Electric Modicon Quantum 140noe77111 Firmware: up to and including 6.9

Published 2019-09-17. Last modified 2026-06-17.