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Fencer Vulns
high 7.5

CVE-2019-13942 json

A vulnerability has been identified in EN100 Ethernet module DNP3 variant (All versions), EN100 Ethernet module IEC 61850 variant (All vers…

published 2019-12-12 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-5209

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

A vulnerability has been identified in EN100 Ethernet module DNP3 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.37), EN100 Ethernet module IEC104 variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). An unauthorized user could exploit a buffer overflow vulnerability in the webserver. Specially crafted packets sent could cause a Denial-of-Service condition and if certain conditions are met, the affected devices must be restarted manually to fully recover. At the time of advisory publication no public exploitation of this security vulnerability was known.

Patch / fix

  • siemens en100_ethernet_module_with_firmware_variant_iec_61850 4.37

Vendor advisories

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

cisa ICSA-19-344-07 updated cvss 7.5

Siemens EN100 Ethernet Module (Update A)

  • Siemens EN100 Ethernet module DNP3 variant
    affected: mitigation
  • Siemens EN100 Ethernet module IEC 61850 variant <V4.37
    affected: fixed in V4.37, mitigation
  • Siemens EN100 Ethernet module IEC104 variant Siemens EN100 Ethernet module Modbus TCP variant Siemens EN100 Ethernet module PROFINET IO variant
    affected: mitigation

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

Exploit prediction

1.95% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Siemens AG EN100 Ethernet module DNP3 variant
  • Siemens AG EN100 Ethernet module IEC 61850 variant
  • Siemens AG EN100 Ethernet module IEC104 variant
  • Siemens AG EN100 Ethernet module Modbus TCP variant
  • Siemens AG EN100 Ethernet module PROFINET IO variant

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.