CVE-2026-1874

Denial-of-Service (DoS) vulnerability in Ethernet function of MELSEC iQ-F Series EtherNet/IP module and Ethernet module

Published Mar 3, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Mitsubishielectric
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
CPEs cpe:2.3:h:mitsubishielectric:melsec_iq-f_fx5-eip:-:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:melsec_iq-f_fx5-enet\/ip:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:melsec_iq-f_fx5-eip_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:melsec_iq-f_fx5-enet\/ip_firmware:*:*:*:*:*:*:*:*
Vendors & Products Mitsubishielectric
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
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
Description 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 all versions 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. 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.
Type Values Removed Values Added
First Time appeared Mitsubishi Electric
Mitsubishi Electric melsec Iq-f Series Fx5-enet/ip Ethernet Module Fx5-enet/ip
Mitsubishi Electric melsec Iq-f Series Fx5-enet Ip
Vendors & Products Mitsubishi Electric
Mitsubishi Electric melsec Iq-f Series Fx5-enet/ip Ethernet Module Fx5-enet/ip
Mitsubishi Electric melsec Iq-f Series Fx5-enet Ip
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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 all versions 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.
Title Denial-of-Service (DoS) vulnerability in Ethernet function of MELSEC iQ-F Series EtherNet/IP module and Ethernet module
Weaknesses CWE-670
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}