Vulnerability in Mitsubishielectric Melsec Iq-F Fx5-Eip
CVE-2026-1874
Always-Incorrect Control Flow Implementation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP versions 1.106 and prior and Mitsubishi Electric Corporation 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 on the products by continuously sending UDP packets to the products. A system reset of the product is required for recovery.
EPSS: 0.004 (34.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mitsubishielectric Melsec_iq-f_fx5-eip
- Mitsubishielectric Melsec_iq-f_fx5-eip_firmware
- Mitsubishielectric Melsec_iq-f_fx5-enet\/ip
- Mitsubishielectric Melsec_iq-f_fx5-enet\/ip_firmware
- Mitsubishi Electric Corporation Melsec Iq-f Series Fx5-eip Ethernet/ip Module — versions versions 1.000 and prior
- Mitsubishi Electric Corporation Melsec Iq-f Series Fx5-enet/ip Ethernet Module — versions versions 1.106 and prior
Weakness classification (CWE)
References
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (government-resource, Third Party Advisory)
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (government-resource, Third Party Advisory)
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-1874?
- CVE-2026-1874 is a high-severity vulnerability in Mitsubishielectric Melsec Iq-F Fx5-Eip, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2026-03-03.
- How severe is CVE-2026-1874?
- High severity. CVSS v3 base score is 7.5 out of 10.