CVE-2022-45794 | Omron CJ-series and CS-series unauthenticated filesystem access.

An attacker with network access to the affected PLC (CJ-series and CS-series PLCs, all versions) may use a network protocol to read and write files on the PLC internal memory and memory card.

Published: 2024-01-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-45794 is rated Moderate Risk (47.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.16%). 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-2022-45794

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 2025-05-31 0.12% 0.16% +0.04%
2 2025-03-30 0.21% 0.12% -0.09%
3 2025-03-29 — 0.21% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-45794

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.6 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
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 4.0 [email protected]
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-2022-45794

Affected software / configurations for CVE-2022-45794

Vendor Product Version Raw CPE
omron sysmac_cj2h-cpu64-eip_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu64-eip_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu64_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu64_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu65-eip_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu65-eip_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu65_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu65_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu66-eip_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu66-eip_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu66_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu66_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu67-eip_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu67-eip_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu67_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu67_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu68-eip_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu68-eip_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2h-cpu68_firmware — cpe:2.3:o:omron:sysmac_cj2h-cpu68_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu11_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu11_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu12_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu12_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu13_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu13_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu14_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu14_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu15_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu15_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu31_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu31_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu32_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu32_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu33_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu33_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu34_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu34_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj2m-cpu35_firmware — cpe:2.3:o:omron:sysmac_cj2m-cpu35_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj1g-cpu45p_firmware — cpe:2.3:o:omron:sysmac_cj1g-cpu45p_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj1g-cpu44p_firmware — cpe:2.3:o:omron:sysmac_cj1g-cpu44p_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj1g-cpu43p_firmware — cpe:2.3:o:omron:sysmac_cj1g-cpu43p_firmware:-:*:*:*:*:*:*:*
omron sysmac_cj1g-cpu42p_firmware — cpe:2.3:o:omron:sysmac_cj1g-cpu42p_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1h-cpu63h_firmware — cpe:2.3:o:omron:sysmac_cs1h-cpu63h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1h-cpu65h_firmware — cpe:2.3:o:omron:sysmac_cs1h-cpu65h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1h-cpu67h_firmware — cpe:2.3:o:omron:sysmac_cs1h-cpu67h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1h-cpu64h_firmware — cpe:2.3:o:omron:sysmac_cs1h-cpu64h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1h-cpu66h_firmware — cpe:2.3:o:omron:sysmac_cs1h-cpu66h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1g-cpu44h_firmware — cpe:2.3:o:omron:sysmac_cs1g-cpu44h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1g-cpu43h_firmware — cpe:2.3:o:omron:sysmac_cs1g-cpu43h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1g-cpu42h_firmware — cpe:2.3:o:omron:sysmac_cs1g-cpu42h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1g-cpu45h_firmware — cpe:2.3:o:omron:sysmac_cs1g-cpu45h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu65h_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu65h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu67h_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu67h_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu68ha_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu68ha_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu67ha_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu67ha_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu65p_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu65p_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu67sa_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu67sa_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu44sa_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu44sa_firmware:-:*:*:*:*:*:*:*
omron sysmac_cs1d-cpu67p_firmware — cpe:2.3:o:omron:sysmac_cs1d-cpu67p_firmware:-:*:*:*:*:*:*:*

References for CVE-2022-45794

cvelogic Threat Intelligence