CVE-2022-30937: Siemens EN100 Ethernet Module DNP3 Firmware

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

A vulnerability has been identified in EN100 Ethernet module DNP3 IP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.37), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). Affected applications contains a memory corruption vulnerability while parsing specially crafted HTTP packets to /txtrace endpoint. This could allow an attacker to crash the affected application leading to a denial of service condition.

Affected products

• 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 4.37 (fixed in 4.37)
• Siemens EN100 Ethernet Module Modbus TCP Firmware: affected versions not specified
• Siemens EN100 Ethernet Module Profinet Io Firmware: affected versions not specified

Published 2022-06-14. Last modified 2026-06-17.