CVE-2026-8806

High

Description

Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by continuously sending a large number of communication packets to the Ethernet port of the product in a short period of time, increasing the processing load of the product, preventing the internal anomaly-detection processing from being performed, and causing the communication function to stop.

SeverityHigh

CVSS8.7

Exploit probability—

ProductMitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP

PublishedJun 19, 2026

First seenJun 19, 2026

Weakness typeCWE-440CWE-440

How to fix

Vendor advisories

mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf

Affected products

Product	Affected versions	Fixed in
Mitsubishi Electric Corporation Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP	No range specified	—

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