What’s Vulnerable › Vulnerabilities

CVE-2022-31204

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-26 · updated 2026-06-17
• Weakness: CWE-319

Description

Omron CS series, CJ series, and CP series PLCs through 2022-05-18 use cleartext passwords. They feature a UM Protection setting that allows users or system integrators to configure a password in order to restrict sensitive engineering operations (such as project/logic uploads and downloads). This password is set using the OMRON FINS command Program Area Protect and unset using the command Program Area Protect Clear, both of which are transmitted in cleartext.

Affected products

• Omron Cp1W-Cif41 Firmware: all versions
• OMRON Corporation CX-Programmer: before 9.6 — fixed in 9.6
• Omron Sysmac Cj2H Firmware: before 1.5 — fixed in 1.5
• Omron Sysmac Cj2M Firmware: before 2.1 — fixed in 2.1
• Omron Sysmac Cp1E Firmware: before 1.30 — fixed in 1.30
• Omron Sysmac Cp1H Firmware: before 1.30 — fixed in 1.30
• Omron Sysmac Cp1L Firmware: before 1.10 — fixed in 1.10
• Omron Sysmac Cs1 Firmware: before 4.1 — fixed in 4.1

How to fix

Upgrade to a fixed version: OMRON Corporation CX-Programmer 9.6; Omron Sysmac Cj2H Firmware 1.5; Omron Sysmac Cj2M Firmware 2.1; Omron Sysmac Cp1E Firmware 1.30; Omron Sysmac Cp1H Firmware 1.30; Omron Sysmac Cp1L Firmware 1.10; Omron Sysmac Cs1 Firmware 4.1. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02
• https://www.forescout.com/blog/
• https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02
• https://www.forescout.com/blog/

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