Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.

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Vendors Products
Mitsubishi Electric Subscribe
Melsec Iq-f Series Fx5-enet/ip Ethernet Module Fx5-enet/ip Subscribe
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Fixes

Solution

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Workaround

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History

Wed, 24 Jun 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Mitsubishi Electric
Mitsubishi Electric melsec Iq-f Series Fx5-enet/ip Ethernet Module Fx5-enet/ip
Vendors & Products Mitsubishi Electric
Mitsubishi Electric melsec Iq-f Series Fx5-enet/ip Ethernet Module Fx5-enet/ip

Mon, 22 Jun 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 19 Jun 2026 03:00:00 +0000

Type Values Removed Values Added
Description Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.
Title Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series EtherNet/IP module
Weaknesses CWE-190
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: Mitsubishi

Published:

Updated: 2026-06-22T14:50:21.057Z

Reserved: 2026-05-18T05:51:43.565Z

Link: CVE-2026-8805

cve-icon Vulnrichment

Updated: 2026-06-22T14:50:17.654Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-24T20:30:04Z

Weaknesses