CVE-2022-31204

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.

Published: 2022-07-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-31204 is rated Moderate Risk (40.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.12%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-31204

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-11 0.17% 0.12% -0.05%
2 2026-01-02 0.14% 0.17% +0.03%
3 2025-12-14 — 0.14% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-31204

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2022-31204

Affected software / configurations for CVE-2022-31204

Vendor Product Version Raw CPE
omron sysmac_cs1_firmware < 4.1 cpe:2.3:o:omron:sysmac_cs1_firmware:*:*:*:*:*:*:*:*
omron sysmac_cj2m_firmware < 2.1 cpe:2.3:o:omron:sysmac_cj2m_firmware:*:*:*:*:*:*:*:*
omron sysmac_cj2h_firmware < 1.5 cpe:2.3:o:omron:sysmac_cj2h_firmware:*:*:*:*:*:*:*:*
omron sysmac_cp1e_firmware < 1.30 cpe:2.3:o:omron:sysmac_cp1e_firmware:*:*:*:*:*:*:*:*
omron sysmac_cp1h_firmware < 1.30 cpe:2.3:o:omron:sysmac_cp1h_firmware:*:*:*:*:*:*:*:*
omron sysmac_cp1l_firmware < 1.10 cpe:2.3:o:omron:sysmac_cp1l_firmware:*:*:*:*:*:*:*:*
omron cp1w-cif41_firmware — cpe:2.3:o:omron:cp1w-cif41_firmware:-:*:*:*:*:*:*:*
omron cx-programmer < 9.6 cpe:2.3:a:omron:cx-programmer:*:*:*:*:*:*:*:*

References for CVE-2022-31204

URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02 Third Party Advisory US Government Resource
https://www.forescout.com/blog/ Third Party Advisory
cvelogic Threat Intelligence