CVE-2018-4840

Name: CVE-2018-4840
Creator: NVD / NIST
Published: 2018-03-08T17:29:00.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.80%

Last modified Jun 17, 2026

CVE-2018-4840 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.80%

75.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
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 104 Firmware	All versions
Siemens	En100 Ethernet Module Dnp3 Firmware	All versions
Siemens	En100 Ethernet Module Modbus Tcp Firmware	All versions
Siemens	En100 Ethernet Module Profinet Io Firmware	All versions
Siemens	En100 Ethernet Module Iec 61850 Firmware	< 4.30

References

https://cert-portal.siemens.com/productcert/pdf/ssa-203306.pdfPatch, Vendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01Third Party Advisory, US Government Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-203306.pdfPatch, Vendor Advisory

Timeline

Published: Mar 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-4840?

How severe is CVE-2018-4840?

Severity scoring for CVE-2018-4840 is pending analysis. The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2018-4840?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4840?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST