CVE-2022-33324

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

1.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-12-23 03:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:49 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.8% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-12-23 03:15 UTC

Last modified

2026-06-17 04:49 UTC

Exploit probability

1.8% · EPSS, next 30 days

Weakness

CWE-404

Record status

Modified

Affected

• Mitsubishi Melsec iq-r r00 Cpu Firmware < 33.0
• Mitsubishi Melsec iq-r r01 Cpu Firmware < 33.0
• Mitsubishi Melsec iq-r r02 Cpu Firmware < 33.0
• Mitsubishi Melsec iq-r r04 Cpu Firmware < 66.0
• Mitsubishi Melsec iq-r r08 Cpu Firmware < 66.0
• Mitsubishi Melsec iq-r r16 Cpu Firmware < 66.0
• Mitsubishi Melsec iq-r r32 Cpu Firmware < 66.0
• Mitsubishi Melsec iq-r r120 Cpu Firmware < 66.0

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-33324.md and follow it. Check whether this project is affected by CVE-2022-33324. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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