Mitsubishi Electric MELSEC iQ-F Series EtherNet/IP module and Ethernet Module (Update A)

Risk Summary

Successful exploitation of these vulnerabilities could allow a remote attacker to cause a denial-of-service condition on the affected products by continuously sending UDP packets to the products.

CVEs (3)

Remediations

• Mitsubishi Electric is releasing fixed version 1.107 or later for Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP. Download the fixed version from the link "https://www.mitsubishielectric.com/fa/download/index.html" and install it. For the update procedure, refer to "9.2 Update Using the Engineering Tool Updating the firmware for the intelligent function module" in the MELSEC iQ-F FX5 User's Manual (Application) which can be downloaded from the link "https://www.mitsubishielectric.com/fa/download/index.html." For more information on the fixed version, refer to the Mitsubishi Electric security advisory at "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf."
• Mitsubishi Electric is releasing fixed version 1.001 or later for Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP. Download the fixed version from the link "https://www.mitsubishielectric.com/fa/download/index.html" and install it. For the update procedure, refer to "9.2 Update Using the Engineering Tool Updating the firmware for the intelligent function module" in the MELSEC iQ-F FX5 User's Manual (Application) which can be downloaded from the link "https://www.mitsubishielectric.com/fa/download/index.html." For more information on the fixed version, refer to the Mitsubishi Electric security advisory at "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf".
• For users who cannot immediately update the product, 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 users who cannot immediately update the product, 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 users who cannot immediately update the product, 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 users who cannot immediately update the product, 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 users who cannot immediately update the product, Mitsubishi Electric recommends installing anti-virus software on PCs that can access the affected product, to minimize the risk of exploiting this vulnerability.
• There are no plans to release a fixed version. Please take the mitigations.
• 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.
• 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.
• 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."
• 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.
• 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 (3)

Affected Sectors

Commercial Facilities