CVE-2022-33324: Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series R00/
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HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE
CVE-2022-33324 is a high-severity flaw (CVSS 7.5) affecting melsec iq-r r00 cpu firmware, melsec iq-r r01 cpu firmware, melsec iq-r r02 cpu firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU Firmware versions "32" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions "65" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R08/16/32/120SFCPU Firmware versions "29" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R08/16/32/120PSFCPU Firmware vers
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
mitsubishi melsec iq-r r00 cpu firmware UPGRADE
Affected: < 33.0
Fixed in: 33.0
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.
mitsubishi melsec iq-r r01 cpu firmware UPGRADE
Affected: < 33.0
Fixed in: 33.0
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.
mitsubishi melsec iq-r r02 cpu firmware UPGRADE
Affected: < 33.0
Fixed in: 33.0
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.
mitsubishi melsec iq-r r04 cpu firmware UPGRADE
Affected: < 66.0
Fixed in: 66.0
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.
mitsubishi melsec iq-r r08 cpu firmware UPGRADE
Affected: < 66.0
Fixed in: 66.0
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.
mitsubishi melsec iq-r r16 cpu firmware UPGRADE
Affected: < 66.0
Fixed in: 66.0
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-2022-33324?
melsec iq-r r00 cpu firmware: upgrade to 33.0; melsec iq-r r01 cpu firmware: upgrade to 33.0; melsec iq-r r02 cpu firmware: upgrade to 33.0. Exact commands for each OS are on this page.
Is CVE-2022-33324 being exploited?
CVE-2022-33324 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-2022-33324 affect?
CVE-2022-33324 affects melsec iq-r r00 cpu firmware, melsec iq-r r01 cpu firmware, melsec iq-r r02 cpu firmware. Severity is high (CVSS 7.5). Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU Firmware versions "32" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware ver
How urgent is CVE-2022-33324?
Priority 51/100. High severity; Remotely exploitable, no login, no user action
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