CVE-2018-4838
mediumpriority · track · 30OT risk · elevatedEPSS 0.014 · 72 %ileEURUUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationEN100 Ethernet module DNP3 variantcisa_csaf_ot
For all other affected products, Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g., firewalls, segmentation, VPN). It is advised to configure the environment according to Siemens ' operational guidelines in order to run the devices in a protected IT environment.
- MitigationEN100 Ethernet module IEC 104 variantcisa_csaf_ot
For all other affected products, Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g., firewalls, segmentation, VPN). It is advised to configure the environment according to Siemens ' operational guidelines in order to run the devices in a protected IT environment.
- MitigationEN100 Ethernet module IEC 61850 variantcisa_csaf_ot
For all other affected products, Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g., firewalls, segmentation, VPN). It is advised to configure the environment according to Siemens ' operational guidelines in order to run the devices in a protected IT environment.
- MitigationEN100 Ethernet module Modbus TCP variantcisa_csaf_ot
For all other affected products, Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g., firewalls, segmentation, VPN). It is advised to configure the environment according to Siemens ' operational guidelines in order to run the devices in a protected IT environment.
- MitigationEN100 Ethernet module PROFINET IO variantcisa_csaf_ot
For all other affected products, Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g., firewalls, segmentation, VPN). It is advised to configure the environment according to Siemens ' operational guidelines in order to run the devices in a protected IT environment.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (29)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-18-067-02ICSA-18-067-02_Siemens SIPROTEC 4, SIPROTEC Compact, and Reyrolle Devices using the EN100 Ethernet Communication Module Extension (Update B)2018-03-08icsa · cisa_csaf_otUS
Ilya Karpov and Dmitry Sklyarov from Positive Technologies reported this vulnerability to Siemens.
also known as (7)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdfcnnvd
- https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01cnnvd
- https://www.securityfocus.com/bid/103379cnnvd
- https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdfenisa_euvd
- https://www.securityfocus.com/bid/103379enisa_euvd
- https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdfPatchVendor Advisorynvd
- https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01Third Party AdvisoryUS Government Resourcenvd
- https://www.securityfocus.com/bid/103379nvd
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