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No exploitation reportedFix available

CVE-2019-13943

No exploitation reported by the sources we read.

  • Published2019-12-12
  • WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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). The web interface could allow Cross-Site Scripting (XSS) attacks if an attacker is able to modify content of particular web pages, causing the application to behave in unexpected ways for legitimate users. Successful exploitation does not require for an attacker to be authenticated to the web interface. This could allow the attacker to read or modify contents of the web application. At the time of advisory publication no public exploitation of this security. vulnerability was known.

Timeline

dates in UTC
  1. 2019-12-1219:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-13943?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-13943?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Siemens en100 ethernet module with firmware variant dnp3 tcpversion to verify
BranchAffectedFixed in
—all versionsno fix published
Siemens en100 ethernet module with firmware variant iec 61850version to verify
BranchAffectedFixed in
4.37< 4.374.37
Siemens en100 ethernet module with firmware variant iec104version to verify
BranchAffectedFixed in
—all versionsno fix published

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-19-344-07 CISA5 known affected

    Siemens EN100 Ethernet Module (Update A)

    Siemens EN100 Ethernet module IEC 61850 variant: All versions < V4.37 · Siemens EN100 Ethernet module PROFINET IO variant: All versions · Siemens EN100 Ethernet module Modbus TCP variant: All versions · +2 more

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-19-344-07 · 1 productUpdate to V4.37 https://support.industry.siemens.com/cs/us/en/view/109745821
  2. Mitigation from the vendor CISA ICSA-19-344-07 · 5 productsBlock access to port 80/tcp and 443/tcp e.g. with an external firewall.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.16.1read 2026-10-23
  • NVDCVSS 2.04.3read 2026-10-23
  • CNAweakness (CWE)CWE-79read 2026-10-23
  • NVDweakness (CWE)CWE-79read 2026-10-23
  • FIRST EPSSEPSS score0.9 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published
2019-12-12
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2019-13943?

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). The web interface could allow Cross-Site Scripting (XSS) attacks if an attacker is able to modify content of particular web pages, causing the application to behave in unexpected ways for legitimate users. Successful exploitation does not require for an attacker to be authenticated to the web interface. This could allow the attacker to read or modify contents of the web application. At the time of advisory publication no public exploitation of this security. vulnerability was known.

Is CVE-2019-13943 actively exploited?

Active exploitation of CVE-2019-13943 has not been confirmed. Its EPSS score was 0.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-13943?

CVE-2019-13943 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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