CVE-2022-46351

Service interruption via crafted PROFINET DCP packets

Published Dec 13, 2022 · Updated Apr 22, 2025

Denial of service in Siemens SCALANCE X204RNA firmware before 3.2.7 allows attackers to interrupt devices via crafted PROFINET DCP packets. The PROFINET DCP packet-processing flaw fails to control resource consumption, but Siemens has not disclosed the specific resource or code locus. An attacker needs unauthenticated Layer 2 access on the local Ethernet segment, and the documented consequence is device unavailability without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Siemens SCALANCE X204RNA firmware before 3.2.7 allows attackers to interrupt devices via crafted PROFINET DCP packets. The PROFINET DCP packet-processing flaw fails to control resource consumption, but Siemens has not disclosed the specific resource or code locus. An attacker needs unauthenticated Layer 2 access on the local Ethernet segment, and the documented consequence is device unavailability without confidentiality or integrity impact.

The record

CVE
CVE-2022-46351
Published
Dec 13, 2022
Updated
Apr 22, 2025
Vendor
Siemens
Product
SCALANCE X204RNA EEC (PRP)
Classifications
CWE-400, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions < V3.2.7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · SCALANCE X204RNA EEC (PRP)version=All versions < V3.2.7
Siemens · SCALANCE X204RNA EEC (PRP/HSR)version=All versions < V3.2.7
Siemens · SCALANCE X204RNA EEC (HSR)version=All versions < V3.2.7
Siemens · SCALANCE X204RNA (HSR)version=All versions < V3.2.7
Siemens · SCALANCE X204RNA (PRP)version=All versions < V3.2.7

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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