Mitsubishi Electric Co.'s MELSEC iQ-F Series FX5-ENET/IP Ethernet Module

Risk Summary

Successful exploitation of this vulnerability could allow 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.

CVEs (1)

Remediations

• There are no plans to release fixed version for MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP. For customers of MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP, refer to the Mitsubishi Electric security advisory "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf", and take the actions described there.
• For customers, Mitsubishi Electric recommends using a firewall, virtual private network (VPN), etc. to prevent unauthorized access when internet access is required, to minimize the risk of exploiting this vulnerability.
• For customers, Mitsubishi Electric recommends using the affected product within a LAN and blocking access from untrusted networks and hosts through firewalls, to minimize the risk of exploiting this vulnerability.
• For customers, Mitsubishi Electric recommends using the IP filter function of the affected product to block access from untrusted hosts and minimize the risk of exploiting this vulnerability. For details on the IP filter function, refer to "13.1 IP Filter Function" in the MELSEC iQ-F FX5 User's Manual (Communication) which can be downloaded from the link "https://www.mitsubishielectric.com/fa/download/index.html."
• For customers, Mitsubishi Electric recommends restricting physical access to the affected product, as well as to PCs and network devices to which it is connected, to minimize the risk of exploiting this vulnerability.
• For customers, Mitsubishi Electric recommends installing anti-virus software on PCs that can access the affected product, to minimize the risk of exploiting this vulnerability.

Affected Vendors

Affected Products (1)

Affected Sectors

Critical Manufacturing