Missing authentication in Siemens EN100 Ethernet module IEC 61850 variant
Priority LOW 36CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-306.
Summary
A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module DNP3 variant (All versions < V1.04), EN100 Ethernet module PROFINET IO variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions < V1.22). The web interface (TCP/80) of affected devices allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.
Why it matters now
EPSS 0.01404 72nd percentileScored 2026-11-07
Fix Fixed EN100 Ethernet module IEC 61850 variant (Siemens AG): V4.30EN100 Ethernet module DNP3 variant (Siemens AG): V1.04+1 more product
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | EN100 Ethernet module IEC 61850 variant | before V4.30 | V4.30 | Patch available | CNA |
| Siemens | EN100 Ethernet module DNP3 variant | before V1.04 | V1.04 | Patch available | CNA |
| Siemens | EN100 Ethernet module PROFINET IO variant | All versions | — | No fix listed | CNA |
| Siemens | EN100 Ethernet module Modbus TCP variant | All versions | — | No fix listed | CNA |
| Siemens | EN100 Ethernet module IEC 104 variant | before V1.22 | V1.22 | Patch available | CNA |
- EN100 Ethernet module IEC 61850 variant VendorSiemens Affected before V4.30 Fixed in V4.30 Patch available CNA
- EN100 Ethernet module DNP3 variant VendorSiemens Affected before V1.04 Fixed in V1.04 Patch available CNA
- EN100 Ethernet module PROFINET IO variant VendorSiemens Affected All versions Fixed in — No fix listed CNA
- EN100 Ethernet module Modbus TCP variant VendorSiemens Affected All versions Fixed in — No fix listed CNA
- EN100 Ethernet module IEC 104 variant VendorSiemens Affected before V1.22 Fixed in V1.22 Patch available CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:en100_ethernet_module_iec_104_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:en100_ethernet_module_iec_104:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:en100_ethernet_module_dnp3_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:en100_ethernet_module_dnp3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:en100_ethernet_module_modbus_tcp_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:en100_ethernet_module_modbus_tcp:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:en100_ethernet_module_profinet_io_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:en100_ethernet_module_profinet_io:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:en100_ethernet_module_iec_61850_firmware:*:*:*:*:*:*:*:* | before 4.30 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:en100_ethernet_module_iec_61850:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:o:siemens:en100_ethernet_module_iec_104_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:en100_ethernet_module_iec_104:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:en100_ethernet_module_dnp3_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:en100_ethernet_module_dnp3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:en100_ethernet_module_modbus_tcp_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:en100_ethernet_module_modbus_tcp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:en100_ethernet_module_profinet_io_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:en100_ethernet_module_profinet_io:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:en100_ethernet_module_iec_61850_firmware:*:*:*:*:*:*:*:* Versions before 4.30 Vulnerable ·Siemens
- cpe:2.3:h:siemens:en100_ethernet_module_iec_61850:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
- Fix · CNA EN100 Ethernet module IEC 61850 variant (Siemens AG) Fixed in V4.30
- Fix · CNA EN100 Ethernet module DNP3 variant (Siemens AG) Fixed in V1.04
- Fix · CNA EN100 Ethernet module IEC 104 variant (Siemens AG) Fixed in V1.22
Timeline
- 2026-10-02 Threatist record created from CVE-2018-4838
- 2026-10-03 Alias added: GHSA-r849-hjqv-324f
References
More Siemens En100 Ethernet Module Dnp3 Firmware vulnerabilities
- TI-2018-03417 Missing authentication in Siemens DIGSI 4 CVSS 3.0HIGH 7.5
- TI-2022-12997 Memory corruption in Siemens EN100 Ethernet module DNP3 IP variant CVSS 3.1HIGH 7.5
- TI-2018-03416 A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet… CVSS 3.0MEDIUM 5.3
Sources
- CVE-2018-4838 · CVE Program
- CVE-2018-4838 · NVD
- FIRST EPSS
- GHSA-r849-hjqv-324f · GitHub Advisory Database · CC BY 4.0
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