Rapidly Established TCP Connections Trigger an Integer Overflow in Mitsubishi MELSEC FX5-EIP Connection Management, Causing Denial of Service

Status: NEW  |  Advisory ID: CVE-2026-8805

Key Details

What to Know

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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