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Fencer Vulns
high 7.5

CVE-2022-30937 json

A vulnerability has been identified in EN100 Ethernet module DNP3 IP variant (All versions), EN100 Ethernet module IEC 104 variant (All ver…

published 2022-06-14 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52686

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

A vulnerability has been identified in EN100 Ethernet module DNP3 IP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.37), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). Affected applications contains a memory corruption vulnerability while parsing specially crafted HTTP packets to /txtrace endpoint. This could allow an attacker to crash the affected application leading to a denial of service condition.

Patch / fix

  • siemens en100_ethernet_module_iec_61850_firmware 4.37

Vendor advisories

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

cisa ICSA-22-167-05 updated cvss 8.6

Siemens EN100 Ethernet Module

  • Siemens EN100 Ethernet module DNP3 IP variant Siemens EN100 Ethernet module IEC 104 variant
    affected: workaround, mitigation, no fix planned
  • Siemens EN100 Ethernet module IEC 61850 variant <V4.37
    affected: fixed in V4.37, workaround, mitigation support.industry.siemens.com
  • Siemens EN100 Ethernet module Modbus TCP variant Siemens EN100 Ethernet module PROFINET IO variant
    affected: workaround, mitigation, no fix planned

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

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% 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 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • Siemens EN100 Ethernet module DNP3 IP 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-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 Out-of-bounds Write

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.