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High · 8.7 CVE-2026-8805 EUVD-2026-37973GHSA-hc5r-cmjq-47w9

Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series EtherNet/IP module

Published Jun 19, 2026 · Updated Jun 22, 2026 · Assigned by Mitsubishi

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.

Affected products

VendorProductAffectedFixed
Mitsubishi Electric Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP versions 1.000 and prior —

Advisories 1

References