No exploitation reportedFix available

CVE-2022-30937

Q: Is CVE-2022-30937 actively exploited?

Active exploitation of CVE-2022-30937 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-30937?

CVE-2022-30937 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2022-06-14
WeaknessCWE-119 · CWE-787

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 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.

Timeline

dates in UTC

2022-06-1410:15CVE 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-2022-30937?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-30937?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 dnp3 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Siemens en100 ethernet module iec 104 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Siemens en100 ethernet module iec 61850 firmwareversion to verify

Branch	Affected	Fixed in	Source
4.37	< 4.37	4.37	NVD

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-22-167-05 CISA5 known affected
Siemens EN100 Ethernet Module
EN100 Ethernet module DNP3 IP variant · EN100 Ethernet module IEC 104 variant · EN100 Ethernet module IEC 61850 variant · +2 more

Full record on NVD

Fix

Vendor fix CISA ICSA-22-167-05 · 1 productUpdate to V4.37 or later version
Workaround from the vendor CISA ICSA-22-167-05 · 5 productsBlock access to port 80/tcp and 443/tcp e.g. with an external firewall
Workaround from the vendor CISA ICSA-22-167-05 · 5 productsApply secure substation concept and Defense-in-Depth (see https://www.siemens.com/gridsecurity) or contact customer care to find specific solutions
Mitigation from the vendor CISA ICSA-22-167-05 · 5 productsDisable web service within the device configuration if it is not used
No fix planned, says the vendor CISA ICSA-22-167-05 · 4 productsCurrently no fix is planned

Advisories and patches

cert-portal.siemens.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
CNAweakness (CWE)CWE-119read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2022-06-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-30937?

Is CVE-2022-30937 actively exploited?

Active exploitation of CVE-2022-30937 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-30937?

CVE-2022-30937 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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