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Fencer Vulns
high 8.6

CVE-2022-45790 json

Omron FINS memory protection susceptible to bruteforce

published 2024-01-22 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-48646

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

The Omron FINS protocol has an authenticated feature to prevent access to memory regions. Authentication is susceptible to bruteforce attack, which may allow an adversary to gain access to protected memory. This access can allow overwrite of values including programmed logic.

Patch / fix

  • Omron CJ-series and CS-series CPU modules 1.3, 1.4, 1.5, 2.1, 4.1

Vendor advisories

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

cisa ICSA-23-262-05 updated cvss 7.5

Omron CJ/CS/CP Series

  • Omron CJ2H-CPU**(-EIP) <= 1.4
    affected: fixed in 1.5, mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us
  • Omron CJ2M-CPU** <= 2.0
    affected: fixed in 2.1, mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us
  • Omron CP1E-E/-N <= 1.2
    affected: fixed in 1.3, mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us
  • Omron CS1D-CPU**H/-CPU**P <= 1.3
    affected: fixed in 1.4, mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us
  • Omron CS1D-CPU**S <= 2.0
    affected: fixed in 2.1, mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us
  • Omron CS1H/G-CPU**H, CJ1G-CPU**P <= 4.0
    affected: fixed in 4.1, mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us
  • Omron Smart Security Manager >= 1.31, <= 1.4, <= 1.5
    affected: mitigation “Omron recommends users update their products as soon as possible. Updated versions can be obtained bycontacting Omron's Customer Care Team.” industrial.omron.us

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
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% 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:N/I:H/A:N
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Omron CJ-series and CS-series CPU modules

Classification

Weakness
  • CWE-307 Improper Restriction of Excessive Authentication Attempts

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.