What’s Vulnerable › Vulnerabilities

CVE-2022-33971

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-04 · updated 2026-06-17
• Weakness: CWE-294

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.

Affected products

• Omron Nj-Pa3001 Firmware: through 1.48
• Omron Nj-Pd3001 Firmware: through 1.48
• Omron Nj101-1000 Firmware: through 1.48
• Omron Nj101-1020 Firmware: through 1.48
• Omron Nj101-9000 Firmware: through 1.48
• Omron Nj101-9020 Firmware: through 1.48
• Omron Nj301-1100 Firmware: through 1.48
• Omron Nj301-1200 Firmware: before 1.48 — fixed in 1.48
• Omron Nj501-1300 Firmware: through 1.48
• Omron Nj501-1320 Firmware: through 1.48
• Omron Nj501-1340 Firmware: through 1.48
• Omron Nj501-140 Firmware: through 1.48
• Omron Nj501-1420 Firmware: through 1.48
• Omron Nj501-1500 Firmware: through 1.48
• Omron Nj501-1520 Firmware: through 1.48
• Omron Nj501-4300 Firmware: through 1.48
• Omron Nj501-4310 Firmware: through 1.48
• Omron Nj501-4320 Firmware: through 1.48
• Omron Nj501-4400 Firmware: through 1.48
• Omron Nj501-4500 Firmware: through 1.48
• Omron Nj501-5300 Firmware: through 1.48
• Omron Nj501-R300 Firmware: through 1.48
• Omron Nj501-R320 Firmware: through 1.48
• Omron Nj501-R400 Firmware: through 1.48
• Omron Nj501-R420 Firmware: through 1.48
• Omron Nj501-R500 Firmware: through 1.48
• Omron Nj501-R520 Firmware: through 1.48
• Omron Nx102-1000 Firmware: through 1.48
• Omron Nx102-1020 Firmware: through 1.48
• Omron Nx102-1100 Firmware: through 1.48

How to fix

Upgrade to a fixed version: Omron Nj301-1200 Firmware 1.48. Check the vendor advisory for mitigations.

References

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

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