CVE-2015-5374: Siemens Siprotec Firmware

High severity, CVSS 7.8. EPSS: 74.5% chance of exploitation in the next 30 days.

A vulnerability has been identified in Firmware variant PROFINET IO for EN100 Ethernet module : All versions < V1.04.01; Firmware variant Modbus TCP for EN100 Ethernet module : All versions < V1.11.00; Firmware variant DNP3 TCP for EN100 Ethernet module : All versions < V1.03; Firmware variant IEC 104 for EN100 Ethernet module : All versions < V1.21; EN100 Ethernet module included in SIPROTEC Merging Unit 6MU80 : All versions < 1.02.02. Specially crafted packets sent to port 50000/UDP could cause a denial-of-service of the affected device. A manual reboot may be required to recover the service of the device.

Affected products

• Siemens Siprotec Firmware: version 4.24 only

Published 2015-07-18. Last modified 2026-06-17.