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Fencer Vulns
high 8.6

CVE-2022-45794 json

Omron CJ-series and CS-series unauthenticated filesystem access.

published 2024-01-10 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-48650

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-108-01 updated cvss 7.5

Omron CS/CJ Series

  • Omron SYSMAC CJ1G-CPU[][]P Omron SYSMAC CJ2H-CPU6[] Omron SYSMAC CJ2H-CPU6[]-EIP Omron SYSMAC CJ2M-CPU[][] Omron SYSMAC CS1D-CPU[][]H Omron SYSMAC CS1D-CPU[][]HA
    +5 more products
    Omron SYSMAC CS1D-CPU[][]P Omron SYSMAC CS1D-CPU[][]S Omron SYSMAC CS1D-CPU[][]SA Omron SYSMAC CS1G-CPU[][]H Omron SYSMAC CS1H-CPU[][]H
    affected: vendor fix ia.omron.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Omron CJ-series and CS-series CPU modules

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.