CVE-2023-7033Network attack vector

Temporary Ethernet denial of service via SYN flood

Published Feb 27, 2024 · Updated Jan 16, 2025

Resource exhaustion in Mitsubishi Electric FA product Ethernet functions allows remote attackers to interrupt communication with a TCP SYN flood. The Ethernet implementation retains finite connection-state resources for large volumes of incomplete TCP handshakes until the resource pool is exhausted. No authentication or user interaction is required; network reachability is sufficient, and Ethernet communication recovers after the temporary interruption.

CVSS severity5.3
Medium
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Mitsubishi Electric FA product Ethernet functions allows remote attackers to interrupt communication with a TCP SYN flood. The Ethernet implementation retains finite connection-state resources for large volumes of incomplete TCP handshakes until the resource pool is exhausted. No authentication or user interaction is required; network reachability is sufficient, and Ethernet communication recovers after the temporary interruption.

The record

CVE
CVE-2023-7033
Published
Feb 27, 2024
Updated
Jan 16, 2025
Vendor
Mitsubishi Electric Corporation
Product
MELSEC iQ-R Series R32CPU CPU Module
Classifications
CWE-410, T1498.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mitsubishi Electric Corporation · MELSEC iQ-R Series R32CPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · NZ2GN12A4-16Dversion=all versions
Mitsubishi Electric Corporation · FX5S-40MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-32MT/DS-TSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-L Series CPU Module L08HCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-64MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series CPU Module R04CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series CPU Module R02CPUversion=all versions
Mitsubishi Electric Corporation · Motion module RD78G64version=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN-AnyWireASLINK bridge module NZ2AW1GNALversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R32ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN-CC-Link IE Field Network bridge module NZ2GN-GFBversion=all versions
Mitsubishi Electric Corporation · FX5S-40MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R120SFCPUversion=all versions
Mitsubishi Electric Corporation · FR-E800-Eversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY NZ2GACP620-60version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MR/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Motion Module RD78G32version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R16PCPUversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN FPGA module NZ2GN2S-D41PD02version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series CPU Module R00CPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MT/DSversion=all versions
Mitsubishi Electric Corporation · FR-A8NCG-Sversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-80MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series Ethernet/IP Module FX5-ENET/IPversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-80MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-L Motion Module LD78G4version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-32MT/DSSversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN FPGA module NZ2GN2S-D41P01version=all versions
Mitsubishi Electric Corporation · FX5S-60MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSERVO-J5 MR-J5-G Seriesversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R120PCPUversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote I/O module NZ2GN2S1-16Tversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-L Series CPU Module L16HCPUversion=all versions
Mitsubishi Electric Corporation · MELSERVO MR-JE-Cversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-L Series CPU Module L32HCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R16ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MT/ESversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Analog-Digital Converter module NZ2GN2B-60AD4version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R08ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · NZ2GN12A2-16Tversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Analog-Digital Converter module NZ2GN2S-60AD4version=all versions
Mitsubishi Electric Corporation · FX5S-60MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R16SFCPUversion=all versions
Mitsubishi Electric Corporation · Motion module RD78GHVversion=all versions
Mitsubishi Electric Corporation · MR-EM441Gversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-T2version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-32MT/DSSversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote I/O module NZ2GN2B1-16Dversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R32PCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSERVO-J5 MR-J5D-G Seriesversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MT/DSSversion=all versions
Mitsubishi Electric Corporation · FX5-CCLGN-MSversion=all versions
Mitsubishi Electric Corporation · FX5S-30MR/ESversion=all versions
Mitsubishi Electric Corporation · NZ2GN12A2-16TEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-64MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-L Series CPU Module L04HCPUversion=all versions
Mitsubishi Electric Corporation · Motion module RD78G8version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-80MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MT/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Ethernet Interface Module RJ71EN71version=all versions
Mitsubishi Electric Corporation · MELSERVO-J4 MR-J4-GF Seriesversion=versions A4 or later
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R04ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5UC-32MR/DS-TSversion=all versions
Mitsubishi Electric Corporation · FX5S-80MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-64MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R08PSFCPUversion=all versions
Mitsubishi Electric Corporation · NZ2GN12A42-16DTversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-64MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R120ENCPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · GT25-J71GN13-T2version=all versions
Mitsubishi Electric Corporation · MELSERVO-J5 MR-J5-A Seriesversion=all versions
Mitsubishi Electric Corporation · NZ2GN12A4-16DEversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote I/O module NZ2GN2S1-16Dversion=all versions
Mitsubishi Electric Corporation · NZ2GN2S1-32DTEversion=all versions
Mitsubishi Electric Corporation · NZ2GNCF1-32Dversion=all versions
Mitsubishi Electric Corporation · FR-F800-E Series Invertersversion=all versions
Mitsubishi Electric Corporation · FX5-40SSC-Gversion=all versions
Mitsubishi Electric Corporation · Motion module RD78G4version=all versions
Mitsubishi Electric Corporation · RD78G16version=all versions
Mitsubishi Electric Corporation · NZ2GNCF1-32Tversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-96MT/DSSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R120PSFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5UC-32MT/Dversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R120CPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-64MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MR/ES-Aversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote I/O module NZ2GN2S1-16TEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-32MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MT/DSversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Digital-Analog Converter module NZ2GN2B-60DA4version=all versions
Mitsubishi Electric Corporation · FX5S-40MT/ESversion=all versions
Mitsubishi Electric Corporation · NZ2GN2B1-32Dversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series OPC UA Module FX5-OPCversion=all versions
Mitsubishi Electric Corporation · MELSERVO MR-J5W-Gversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-32MT/DSS-TSversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Digital-Analog Converter module NZ2GN2S-60DA4version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-64MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R08PCPUversion=all versions
Mitsubishi Electric Corporation · FX5S-30MT/ESSversion=all versions
Mitsubishi Electric Corporation · FX5-80SSC-Gversion=all versions
Mitsubishi Electric Corporation · NZ2GN2S1-32Dversion=all versions
Mitsubishi Electric Corporation · FX5S-80MR/ESversion=all versions
Mitsubishi Electric Corporation · FX5S-30MT/ESversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN FPGA module NZ2GN2S-D41D01version=all versions
Mitsubishi Electric Corporation · NZ2GN12A42-16DTEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-80MR/ESversion=all versions
Mitsubishi Electric Corporation · Motion module RD78GHWversion=all versions
Mitsubishi Electric Corporation · FR-A800-GNversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-32MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-32MT/ESSversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY NZ2GACP620-300version=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote I/O module NZ2GN2B1-16Tversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-64MT/Dversion=all versions
Mitsubishi Electric Corporation · FX5S-60MT/ESSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R08SFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MR/ES-Aversion=all versions
Mitsubishi Electric Corporation · FR-A8NCGversion=all versions
Mitsubishi Electric Corporation · MELSERVO MR-JET-Gversion=all versions
Mitsubishi Electric Corporation · NZ2GN2S1-32Tversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MT/ES-Aversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series CPU Module R01CPUversion=all versions
Mitsubishi Electric Corporation · MELSERVO MR-MD333Gversion=all versions
Mitsubishi Electric Corporation · CC-Link IE TSN Remote I/O module NZ2GN2B1-16TEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-80MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-L Motion Module LD78G16version=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R16PSFCPUversion=all versions
Mitsubishi Electric Corporation · FR-A800-Eversion=all versions
Mitsubishi Electric Corporation · NZ2GNCE3-32Dversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-SXversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series SIL2 Process CPU R32PSFCPUversion=all versions
Mitsubishi Electric Corporation · NZ2GNCE3-32DTversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-24MT/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series Ethernet Module FX5-ENETversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series CPU Module R08CPUversion=all versions
Mitsubishi Electric Corporation · FX5S-80MT/ESSversion=all versions
Mitsubishi Electric Corporation · NZ2GN2B1-32TEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series Safety CPU R32SFCPUversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-64MT/ESSversion=all versions
Mitsubishi Electric Corporation · NZ2GN2S1-32DTversion=all versions
Mitsubishi Electric Corporation · NZ2GN2B1-32DTversion=all versions
Mitsubishi Electric Corporation · NZ2GN2B1-32Tversion=all versions
Mitsubishi Electric Corporation · NZ2GN2B1-32DTEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-80MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-EIPversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-40MT/ES-Aversion=all versions
Mitsubishi Electric Corporation · NZ2GN2S1-32TEversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UJ-60MR/ESversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-32MT/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-R Series R16CPU CPU Moduleversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU module FX5U-32MR/DSversion=all versions
Mitsubishi Electric Corporation · MELSEC iQ-F Series CPU Module FX5UC-96MT/Dversion=all versions

Published CVSS scores

5.3Mitsubishi Electric CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-410Insufficient Resource Pool
T1498.001Direct Network Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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