CVE-2018-4840

mediumpriority · track · 31OT risk · elevatedEPSS 0.018 · 78 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.78% (78th) EPSS
CVSS 5 · medium
Is it mine?
41 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedDIGSI 4siemens_psirt

    Update to V4.92

    https://support.industry.siemens.com/cs/ww/en/view/109740980
  • FixedEN100 Ethernet module DNP3 variantsiemens_psirt

    Update to V1.05.00 and configure DIGSI 4 connection password

    https://support.industry.siemens.com/cs/us/en/view/109745821
  • FixedEN100 Ethernet module IEC 61850 variantsiemens_psirt

    Update to V4.30 and configure DIGSI 4 connection password

    https://support.industry.siemens.com/cs/us/en/view/109745821
  • FixedDIGSI 4cisa_csaf_ot

    Update to V4.92

    https://support.industry.siemens.com/cs/ww/en/view/109740980
  • FixedEN100 Ethernet module DNP3 variantcisa_csaf_ot

    Update to V1.05.00 and configure DIGSI 4 connection password

    https://support.industry.siemens.com/cs/us/en/view/109745821
  • FixedEN100 Ethernet module IEC 61850 variantcisa_csaf_ot

    Update to V4.30 and configure DIGSI 4 connection password

    https://support.industry.siemens.com/cs/us/en/view/109745821
  • MitigationDIGSI 4siemens_psirt

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module DNP3 variantsiemens_psirt

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module IEC 104 variantsiemens_psirt

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module IEC 61850 variantsiemens_psirt

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module Modbus TCP variantsiemens_psirt

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module PROFINET IO variantsiemens_psirt

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationDIGSI 4cisa_csaf_ot

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module DNP3 variantcisa_csaf_ot

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module IEC 104 variantcisa_csaf_ot

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module IEC 61850 variantcisa_csaf_ot

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module Modbus TCP variantcisa_csaf_ot

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • MitigationEN100 Ethernet module PROFINET IO variantcisa_csaf_ot

    Apply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions.

  • No fix availableEN100 Ethernet module IEC 104 variantsiemens_psirt

    Currently no remediation is available

  • No fix availableEN100 Ethernet module Modbus TCP variantsiemens_psirt

    Currently no remediation is available

  • No fix availableEN100 Ethernet module PROFINET IO variantsiemens_psirt

    Currently no remediation is available

  • No fix availableEN100 Ethernet module IEC 104 variantcisa_csaf_ot

    Currently no remediation is available

  • No fix availableEN100 Ethernet module Modbus TCP variantcisa_csaf_ot

    Currently no remediation is available

  • No fix availableEN100 Ethernet module PROFINET IO variantcisa_csaf_ot

    Currently no remediation is available

02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · CISA US
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-306USCWE-306USCWE-306US
04

affected products (41)

Products and version ranges known to be affected.

showing 20 of 41
05

advisories (2)

Vendor and ecosystem advisories describing this.

  • SSA-203306SSA-203306: Password Vulnerabilities in SIPROTEC 4 and SIPROTEC Compact Relay Families2018-03-08csaf · siemens_psirtDE

    SIPROTEC 4 and SIPROTEC Compact devices could allow access authorization passwords to be reconstructed or overwritten via engineering mechanisms that involve DIGSI 4 and EN100 Ethernet communication modules. Siemens has released updates for several affected products, and recommends specific countermeasures for the remaining products.

  • ICSA-18-067-01Siemens SIPROTEC 4, SIPROTEC Compact, DIGSI 4, and EN100 Ethernet Module (Update D)2018-03-08icsa · cisa_csaf_otUS

    SIPROTEC 4 and SIPROTEC Compact devices could allow access authorization passwords to be reconstructed or overwritten via engineering mechanisms that involve DIGSI 4 and EN100 Ethernet communication modules. Siemens has released updates for several affected products, and recommends specific countermeasures for the remaining products.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtNVDCVE.orgMITRE
published 2018-03-08modified 2026-06-17
08

references (5)

External citations — patches, advisories, analysis.

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