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Fencer Vulns
high 7.5

CVE-2018-4840 json

A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet module DNP3 variant (All versions < V1.05.00), EN100…

published 2018-03-08 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16626

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • siemens siprotec_compact_7sj80_firmware 4.77
  • siemens siprotec_compact_7sk80_firmware 4.77
  • siemens siprotec_4_7sj66_firmware 4.30
  • siemens digsi_4 4.92
  • 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-18-067-01 updated cvss 7.5

Siemens SIPROTEC 4, SIPROTEC Compact, DIGSI 4, and EN100 Ethernet Module (Update D)

  • Siemens DIGSI 4 <V4.92
    affected: fixed in V4.92, mitigation support.industry.siemens.com
  • Siemens EN100 Ethernet module DNP3 variant <V1.05.00
    affected: fixed in V1.05.00, mitigation support.industry.siemens.com
  • Siemens EN100 Ethernet module IEC 104 variant
    affected: mitigation, no fix available
  • Siemens EN100 Ethernet module IEC 61850 variant <V4.30
    affected: fixed in V4.30, mitigation support.industry.siemens.com
  • Siemens EN100 Ethernet module Modbus TCP variant Siemens EN100 Ethernet module PROFINET IO variant
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 DIGSI 4
  • Siemens EN100 Ethernet module DNP3 variant
  • Siemens EN100 Ethernet module IEC 104 variant
  • Siemens EN100 Ethernet module IEC 61850 variant
  • Siemens EN100 Ethernet module Modbus TCP variant
  • Siemens EN100 Ethernet module PROFINET IO variant

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns 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.