What’s Vulnerable › Vulnerabilities

CVE-2022-31205

• 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-312

Description

In Omron CS series, CJ series, and CP series PLCs through 2022-05-18, the password for access to the Web UI is stored in memory area D1449...D1452 and can be read out using the Omron FINS protocol without any further authentication.

Affected products

• Omron Cp1W-Cif41 Firmware: all versions
• 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 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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