HOMEVULNERABILITIESCVE-2022-33324
HIGH

CVE-2022-33324

CWE-404Published: December 23, 2022· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2022-33324 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

mitsubishi38 product(s)
melsec iq-r r00 cpu firmwaremelsec iq-r r00 cpumelsec iq-r r01 cpu firmwaremelsec iq-r r01 cpumelsec iq-r r02 cpu firmwaremelsec iq-r r02 cpumelsec iq-r r04 cpu firmwaremelsec iq-r r04 cpumelsec iq-r r08 cpu firmwaremelsec iq-r r08 cpumelsec iq-r r16 cpu firmwaremelsec iq-r r16 cpu+26
Source: NVD CPE · 38 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.cisa.gov/uscert/ics/advisories/icsa-22-356-03
PATCHhttps://www.cisa.gov/uscert/ics/advisories/icsa-22-356-03
ADVISORYhttps://jvn.jp/vu/JVNVU96883262
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-018_en.pdf
ADVISORYhttps://jvn.jp/vu/JVNVU96883262
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-018_en.pdf

All References (6)

→
https://jvn.jp/vu/JVNVU96883262Third Party Advisory
→
https://www.cisa.gov/uscert/ics/advisories/icsa-22-356-03Patch · Third Party Advisory · US Government Resource
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-018_en.pdfVendor Advisory
→
https://jvn.jp/vu/JVNVU96883262Third Party Advisory
→
https://www.cisa.gov/uscert/ics/advisories/icsa-22-356-03Patch · Third Party Advisory · US Government Resource
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-018_en.pdfVendor Advisory

Quick Facts

CVE IDCVE-2022-33324
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-404
CISA KEVNo
Affected1 vendor(s)
PublishedDec 23, 2022

Related CVEs (CWE-404)

CVE-2023-24444
9.8
CVE-2025-5867
9.8
CVE-2026-1173
9.8
CVE-2018-8450
8.8
CVE-2026-11317
8.7
CVE-2017-1145
8.6

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-33324 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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