How severe is CVE-2022-45794?

CVE-2022-45794 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2022-45794 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-45794?

CVE-2022-45794 primarily affects Omron Sysmac Cj2h-cpu64-eip Firmware. In total, 41 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-45794?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2022-45794 have an EU (EUVD) identifier?

Yes. CVE-2022-45794 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-48650.

When was CVE-2022-45794 published?

CVE-2022-45794 was published on 2024-01-10 and last updated on 2026-06-17.

CVE-2022-45794

CVE-2022-45794 is a high-severity vulnerability in Omron Sysmac Cj2h-cpu64-eip Firmware with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2022-48650
Weakness: CWE-306
Affected product: Omron Sysmac Cj2h-cpu64-eip Firmware
Published: 2024-01-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2022-45794?: 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.
How severe is CVE-2022-45794?: CVE-2022-45794 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2022-45794 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-45794?: CVE-2022-45794 primarily affects Omron Sysmac Cj2h-cpu64-eip Firmware. In total, 41 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-45794?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2022-45794 have an EU (EUVD) identifier?: Yes. CVE-2022-45794 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-48650.
When was CVE-2022-45794 published?: CVE-2022-45794 was published on 2024-01-10 and last updated on 2026-06-17.

References

Affected products (41)

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

More vulnerabilities in Omron Sysmac Cj2h-cpu64-eip Firmware

CVE-2023-0811 — Critical (CVSS 9.1): Omron CJ1M unit v4.0 and prior has improper access controls on the memory region where the UM password is stored. If an…

All CVEs affecting Omron Sysmac Cj2h-cpu64-eip Firmware →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

CVE-2026-54309 — Critical (CVSS 10.0): n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP…
CVE-2026-50242 — Critical (CVSS 10.0): In JetBrains Hub before 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429…
CVE-2026-49257 — Critical (CVSS 10.0): mcp-pinot is a Python-based Model Context Protocol (MCP) server for interacting with Apache Pinot. In versions 3.0.1…
CVE-2026-46846 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46803 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46800 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites).…

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →