No exploitation reportedFix available

CVE-2022-33324

Q: Is CVE-2022-33324 actively exploited?

Active exploitation of CVE-2022-33324 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-33324?

CVE-2022-33324 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2022-12-23
WeaknessCWE-404

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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 versions "08" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R12CCPU-V Firmware versions "17" and prior, Mitsubishi Electric Corporation MELSEC iQ-L Series L04/08/16/32HCPU Firmware versions "05" and prior and Mitsubishi Electric Corporation MELIPC Series MI5122-VW Firmware versions "07" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition in Ethernet communication on the module by sending specially crafted packets. A system reset of the module is required for recovery.

Timeline

dates in UTC

2022-12-2303:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-33324?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-33324?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Mitsubishi melipc mi5122-vw firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Mitsubishi melsec iq-l l04 hcpu firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Mitsubishi melsec iq-l l08 hcpu firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

16 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-22-356-03 CISA22 known affected
Mitsubishi Electric MELSEC iQ-R, iQ-L Series and MELIPC Series (Update E)
Mitsubishi Electric MELSEC iQ-R Series R00CPU: <=firmware_32 · Mitsubishi Electric MELSEC iQ-R Series R01CPU: <=firmware_32 · Mitsubishi Electric MELSEC iQ-R Series R02CPU: <=firmware_32 · +19 more

Full record on NVD

Fix

Vendor fix CISA ICSA-22-356-03 · 1 productMELSEC iQ-R Series R00CPU: firmware versions 33 or later
Vendor fix CISA ICSA-22-356-03 · 1 productMELSEC iQ-R Series R01CPU: firmware versions 33 or later
Vendor fix CISA ICSA-22-356-03 · 1 productMELSEC iQ-R Series R02CPU: firmware versions 33 or later
Vendor fix CISA ICSA-22-356-03 · 1 productMELSEC iQ-R Series R04(EN)CPU: firmware versions 66 or later
Vendor fix CISA ICSA-22-356-03 · 1 productMELSEC iQ-R Series R08(EN)CPU: firmware versions 66 or later
Vendor fix CISA ICSA-22-356-03 · 1 productMELSEC iQ-R Series R16(EN)CPU: firmware versions 66 or later

Advisories and patches

www.cisa.govPatch
www.mitsubishielectric.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-404read 2026-10-23
NVDweakness (CWE)CWE-404read 2026-10-23
FIRST EPSSEPSS score1.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2022-12-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-33324?

Is CVE-2022-33324 actively exploited?

Active exploitation of CVE-2022-33324 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-33324?

CVE-2022-33324 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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