CVE-2022-45790: The Omron FINS protocol has an authenticated feature to prevent access to memory regions
50
This month
HIGH 8.6REMOTEUPGRADEUPGRADEUPGRADE
CVE-2022-45790 is a high-severity flaw (CVSS 8.6) affecting cj1g-cpu45p firmware, cj1g-cpu45p-gtc firmware, cj1g-cpu44p firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
omron cj1g-cpu45p firmware UPGRADE
Affected: < 4.1
Fixed in: 4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
omron cj1g-cpu45p-gtc firmware UPGRADE
Affected: < 4.1
Fixed in: 4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
omron cj1g-cpu44p firmware UPGRADE
Affected: < 4.1
Fixed in: 4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
omron cj1g-cpu43p firmware UPGRADE
Affected: < 4.1
Fixed in: 4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
omron cj1g-cpu42p firmware UPGRADE
Affected: < 4.1
Fixed in: 4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
omron cp1e-e firmware UPGRADE
Affected: < 1.3
Fixed in: 1.3
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official sourceNVD · CVE Program · Report a problem with this page Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2022-45790?
cj1g-cpu45p firmware: upgrade to 4.1; cj1g-cpu45p-gtc firmware: upgrade to 4.1; cj1g-cpu44p firmware: upgrade to 4.1. Exact commands for each OS are on this page.
Is CVE-2022-45790 being exploited?
CVE-2022-45790 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2022-45790 affect?
CVE-2022-45790 affects cj1g-cpu45p firmware, cj1g-cpu45p-gtc firmware, cj1g-cpu44p firmware. Severity is high (CVSS 8.6). 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 o
How urgent is CVE-2022-45790?
Priority 50/100. High severity; Remotely exploitable, no login, no user action
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