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Fencer Intel
high 7.5

CVE-2018-4838 json

A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module DNP3 variant (…

published 2018-03-08 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16624

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

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.

Patch / fix

  • siemens en100_ethernet_module_iec_61850_firmware 4.30

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-067-02 updated cvss 7.5

ICSA-18-067-02_Siemens SIPROTEC 4, SIPROTEC Compact, and Reyrolle Devices using the EN100 Ethernet Communication Module Extension (Update B)

  • Siemens EN100 Ethernet module DNP3 variant < 1.04 Siemens EN100 Ethernet module IEC 104 variant < 1.22 Siemens EN100 Ethernet module IEC 61850 variant < 4.30 Siemens EN100 Ethernet module Modbus TCP variant Siemens EN100 Ethernet module PROFINET IO variant
    affected: mitigation “EN100 Ethernet module IEC 61850 variant (All versions prior to v4.30): Update to v4.30, which can be located here: https://support.industry.siemens.com/cs/us/en/view/109745821” support.industry.siemens.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • Siemens AG EN100 Ethernet module IEC 61850 variant
  • Siemens AG EN100 Ethernet module DNP3 variant
  • Siemens AG EN100 Ethernet module PROFINET IO variant
  • Siemens AG EN100 Ethernet module Modbus TCP variant
  • Siemens AG EN100 Ethernet module IEC 104 variant

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.