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Full vulnerability report · 2024
CVE-2023-7033High confidence

Mitsubishi Electric Corporation MELSEC iQ-R series CPU module R00CPU — Insufficient Resource Pool

Mitsubishi Electric Corporation · MELSEC iQ-R series CPU module R00CPU

5.3MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.85% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Mitsubishi Electric Corporation MELSEC iQ-R series CPU module R00CPU and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-59224

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
01

What, why and how

Insufficient Resource Pool vulnerability in Ethernet function of Mitsubishi Electric Corporation MELSEC iQ-R series CPU module, MELSEC iQ-L series CPU module, MELSEC iQ-R Ethernet Interface Module, MELSEC iQ-R CC-Link IE TSN Master/Local Module, CC-Link IE TSN Remote I/O Module, CC-Link IE TSN Analog-Digital Converter Module, CC-Link IE TSN Digital-Analog Converter Module, CC-Link IE TSN - CC-Link IE Field Network Bridge Module, CC-Link IE TSN - AnyWireASLINK Bridge Module, CC-Link IE TSN FPGA Module, CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY, MELSEC iQ-R Motion Module, MELSEC iQ-L Motion Module, MELSEC iQ-F FX5 Motion Module, MELSEC iQ-F Series CPU module, MELSEC iQ-F Series Ethernet module, MELSEC iQ-F Series Ethernet/IP module, MELSEC iQ-F Series OPC UA Module, MELSEC iQ-F Series CC-Link IE TSN master/local module, GOT2000 Series CC-Link IE TSN Communication Unit, FR-A800-E series inverters, FR-F800-E series inverters, FR-E800-E series inverters, INVERTER CC-Link IE TSN Plug-in option, INVERTER CC-Link IE TSN Safety Plug-in option, INVERTER CC-Link IE TSN communication function built-in type, MR-J5 series AC Servos MELSERVO, MR-JET series AC Servos MELSERVO, MR-MD333G series AC Servos MELSERVO, MR-JE series AC Servos MELSERVO, MELSERVO-J4 AC Servos MELSERVO and Embedded Type Servo System Controller allow a remote attacker to cause a temporary Denial of Service condition for a certain period of time in Ethernet communication of the products by performing TCP SYN Flood attack.

What

Insufficient Resource Pool vulnerability in Ethernet function of Mitsubishi Electric Corporation MELSEC iQ-R series CPU module, MELSEC iQ-L series CPU module, MELSEC iQ-R Ethernet Interface Module, MELSEC iQ-R CC-Link IE TSN Master/Local Module, CC-Link IE TSN Remote I/O Module, CC-Link IE TSN Analog-Digital Converter Module, CC-Link IE TSN Digital-Analog Converter Module, CC-Link IE TSN - CC-Link IE Field Network Bridge Module, CC-Link IE TSN - AnyWireASLINK Bridge Module, CC-Link IE TSN FPGA Module, CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY, MELSEC iQ-R Motion Module, MELSEC iQ-L Motion Module, MELSEC iQ-F FX5 Motion Module, MELSEC iQ-F Series CPU module, MELSEC iQ-F Series Ethernet module, MELSEC iQ-F Series Ethernet/IP module, MELSEC iQ-F Series OPC UA Module, MELSEC iQ-F Series CC-Link IE TSN master/local module, GOT2000 Series CC-Link IE TSN Communication Unit, FR-A800-E series inverters, FR-F800-E series inverters, FR-E800-E series inverters, INVERTER CC-Link IE TSN Plug-in option, INVERTER CC-Link IE TSN Safety Plug-in option, INVERTER CC-Link IE TSN communication function built-in type, MR-J5 series AC Servos MELSERVO, MR-JET series AC Servos MELSERVO, MR-MD333G series AC Servos MELSERVO, MR-JE series AC Servos MELSERVO, MELSERVO-J4 AC Servos MELSERVO and Embedded Type Servo System Controller allow a remote attacker to cause a temporary Denial of Service condition for a certain period of time in Ethernet communication of the products by performing TCP SYN Flood attack.

Why

The product's resource pool is not large enough to handle peak demand, which allows an attacker to prevent others from accessing the resource by using a (relatively) large number of requests for resources.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Insufficient Resource Pool vulnerability in Ethernet function of Mitsubishi Electric Corporation MELSEC iQ-R series CPU module, MELSEC iQ-L series CPU module, MELSEC iQ-R Ethernet Interface Module, MELSEC iQ-R CC-Link IE TSN Master/Local Module, CC-Link IE TSN Remote I/O Module, CC-Link IE TSN Analog-Digital Converter Module, CC-Link IE TSN Digital-Analog Converter Module, CC-Link IE TSN - CC-Link IE Field Network Bridge Module, CC-Link IE TSN - AnyWireASLINK Bridge Module, CC-Link IE TSN FPGA Module, CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY, MELSEC iQ-R Motion Module, MELSEC iQ-L Motion Module, MELSEC iQ-F FX5 Motion Module, MELSEC iQ-F Series CPU module, MELSEC iQ-F Series Ethernet module, MELSEC iQ-F Series Ethernet/IP module, MELSEC iQ-F Series OPC UA Module, MELSEC iQ-F Series CC-Link IE TSN master/local module, GOT2000 Series CC-Link IE TSN Communication Unit, FR-A800-E series inverters, FR-F800-E series inverters, FR-E800-E series inverters, INVERTER CC-Link IE TSN Plug-in option, INVERTER CC-Link IE TSN Safety Plug-in option, INVERTER CC-Link IE TSN communication function built-in type, MR-J5 series AC Servos MELSERVO, MR-JET series AC Servos MELSERVO, MR-MD333G series AC Servos MELSERVO, MR-JE series AC Servos MELSERVO, MELSERVO-J4 AC Servos MELSERVO and Embedded Type Servo System Controller allow a remote attacker to cause a temporary Denial of Service condition for a certain period of time in Ethernet communication of the products by performing TCP SYN Flood attack.

Why

The product's resource pool is not large enough to handle peak demand, which allows an attacker to prevent others from accessing the resource by using a (relatively) large number of requests for resources.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Insufficient Resource Pool → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-410 ↗

CWE-410: Insufficient Resource Pool. The product's resource pool is not large enough to handle peak demand, which allows an attacker to prevent others from accessing the resource by using a (relatively) large number of requests for resources.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-410
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20240228Security Bulletin 28 Feb 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 28 Feb 2024, published on 28 February 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-002873複数の三菱電機製 FA 製品の Ethernet 機能におけるサービス運用妨害（DoS）の脆弱性

複数の三菱電機製 FA 製品の Ethernet 機能には、不十分なリソースプールに起因するサービス運用妨害（DoS）の脆弱性（CWE-410、CVE-2023-7033）が存在します。 この脆弱性情報は、製品利用者への周知を目的に、開発者が JPCERT/CC に報告し、JPCERT/CC が開発者との調整を行いました。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
  • MELSEC iQ-R series CPU module R00CPU: all versions
  • MELSEC iQ-R series CPU module R01CPU: all versions
  • MELSEC iQ-R series CPU module R02CPU: all versions
  • MELSEC iQ-R series CPU module R04CPU: all versions
  • MELSEC iQ-R series CPU module R08CPU: all versions
  • MELSEC iQ-R series CPU module R16CPU: all versions
  • MELSEC iQ-R series CPU module R32CPU: all versions
  • MELSEC iQ-R series CPU module R120CPU: all versions
  • MELSEC iQ-R series CPU module R04ENCPU: all versions
  • MELSEC iQ-R series CPU module R08ENCPU: all versions
  • MELSEC iQ-R series CPU module R16ENCPU: all versions
  • MELSEC iQ-R series CPU module R32ENCPU: all versions
  • MELSEC iQ-R series CPU module R120ENCPU: all versions
  • MELSEC iQ-R series CPU module R08SFCPU: all versions
  • MELSEC iQ-R series CPU module R16SFCPU: all versions
  • MELSEC iQ-R series CPU module R32SFCPU: all versions
  • MELSEC iQ-R series CPU module R120SFCPU: all versions
  • MELSEC iQ-R series CPU module R08PCPU: all versions
  • MELSEC iQ-R series CPU module R16PCPU: all versions
  • MELSEC iQ-R series CPU module R32PCPU: all versions
  • MELSEC iQ-R series CPU module R120PCPU: all versions
  • MELSEC iQ-R series CPU module R08PSFCPU: all versions
  • MELSEC iQ-R series CPU module R16PSFCPU: all versions
  • MELSEC iQ-R series CPU module R32PSFCPU: all versions
  • MELSEC iQ-R series CPU module R120PSFCPU: all versions
  • MELSEC iQ-L series CPU module L04HCPU: all versions
  • MELSEC iQ-L series CPU module L08HCPU: all versions
  • MELSEC iQ-L series CPU module L16HCPU: all versions
  • MELSEC iQ-L series CPU module L32HCPU: all versions
  • MELSEC iQ-R Ethernet Interface Module RJ71EN71: all versions
  • MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-T2: all versions
  • MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-SX: all versions
  • MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-EIP: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-32D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-32T: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-32TE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-32DT: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-32DTE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-16D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-16T: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2B1-16TE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-32D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-32T: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-32TE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-32DT: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-32DTE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-16D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-16T: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN2S1-16TE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GNCF1-32D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GNCF1-32T: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GNCE3-32D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GNCE3-32DT: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN12A4-16D: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN12A4-16DE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN12A2-16T: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN12A2-16TE: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN12A42-16DT: all versions
  • CC-Link IE TSN Remote I/O Module NZ2GN12A42-16DTE: all versions
  • CC-Link IE TSN Analog-Digital Converter Module NZ2GN2S-60AD4: all versions
  • CC-Link IE TSN Analog-Digital Converter Module NZ2GN2B-60AD4: all versions
  • CC-Link IE TSN Digital-Analog Converter Module NZ2GN2S-60DA4: all versions
  • CC-Link IE TSN Digital-Analog Converter Module NZ2GN2B-60DA4: all versions
  • CC-Link IE TSN - CC-Link IE Field Network Bridge Module NZ2GN-GFB: all versions
  • CC-Link IE TSN - AnyWireASLINK Bridge Module NZ2AW1GNAL: all versions
  • CC-Link IE TSN FPGA Module NZ2GN2S-D41P01: all versions
  • 98 additional product groups retained in the authoritative source
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 27 Feb 2024 · Last source change 16 Jan 2025, 04:31 UTC · CWE-410 · Insufficient Resource Pool

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-59224
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD not scheduled

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2023-59224↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-7033 · cve.blacktree.nl