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Abstract

A denial-of-service (DoS) vulnerability exists in the MELSEC iQ-F Series FX5-ENET/IP Ethernet module. A remote attacker may be able 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. (CVE-2026-8806)