PT-2026-50828 · Mitsubishi · Mitsubishi Electric Melsec Iq-F Series Fx5-Eip Ethernet/Ip Module Fx5-Eip

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-8805

Mitre

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-8805

Affected Products

Mitsubishi Electric Melsec Iq-F Series Fx5-Eip Ethernet/Ip Module Fx5-Eip

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-8805 · Security Note
• https://mitsubishielectric.com/psirt/vulnerability/pdf/2026-002_en.pdf · Vendor Advisory
• https://jvn.jp/vu/JVNVU97140216 · Note
• https://cisa.gov/news-events/ics-advisories/icsa-26-169-05 · Note