CVE-2018-4840: Siemens Digsi 4

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet module DNP3 variant (All versions < V1.05.00), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). The device engineering mechanism allows an unauthenticated remote user to upload a modified device configuration overwriting access authorization passwords.

Affected products

• Siemens Digsi 4: before 4.92 (fixed in 4.92)
• Siemens EN100 Ethernet Module DNP3 Firmware: affected versions not specified
• Siemens EN100 Ethernet Module Iec 104 Firmware: affected versions not specified
• Siemens EN100 Ethernet Module Iec 61850 Firmware: before 4.30 (fixed in 4.30)
• Siemens EN100 Ethernet Module Modbus TCP Firmware: affected versions not specified
• Siemens EN100 Ethernet Module Profinet Io Firmware: affected versions not specified
• Siemens Siprotec 4 7sj66 Firmware: before 4.30 (fixed in 4.30)
• Siemens Siprotec Compact 7sj80 Firmware: before 4.77 (fixed in 4.77)
• Siemens Siprotec Compact 7sk80 Firmware: before 4.77 (fixed in 4.77)

Published 2018-03-08. Last modified 2026-06-17.