CVE-2023-49252Network attack vector

Service interruption via unauthenticated IP configuration change

Published Jan 9, 2024 · Updated Jun 17, 2025

Improper input validation in Siemens SIMATIC CN 4100 before 2.7 allows remote attackers to interrupt service via IP configuration changes. The IP configuration function applies attacker-supplied network settings without authenticating the requester; Siemens has not identified the request path or parameter. Network reachability is sufficient, and changing the device's address can make the communication node unavailable without reported data disclosure.

CVSS severity7.5
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Siemens SIMATIC CN 4100 before 2.7 allows remote attackers to interrupt service via IP configuration changes. The IP configuration function applies attacker-supplied network settings without authenticating the requester; Siemens has not identified the request path or parameter. Network reachability is sufficient, and changing the device's address can make the communication node unavailable without reported data disclosure.

The record

CVE
CVE-2023-49252
Published
Jan 9, 2024
Updated
Jun 17, 2025
Vendor
Siemens
Product
SIMATIC CN 4100
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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 < V2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC CN 4100version=All versions < V2.7

Published CVSS scores

7.5Siemens AGCVSS:3.1/AV:N/AC:L/PR:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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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