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, 2026Updated: May 4, 2026 Sources: CVE List NVD csafCWE-670

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

Open in CVSS calculator →

Weaknesses

CWE-670

Affected Products

mitsubishielectric

commercial·JPaka mitsubishi electric

melsec iq-f fx5-eip firmware

ICS / OT / IoT

melsec iq-f fx5-enet\/ip firmware

ICS / OT / IoT

Mitsubishi Electric Corporation

commercial·JPaka mitsubishi electric

MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP

ICS / OT / IoT

MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP

ICS / OT / IoT

Exploitability

Official Patch Available

Is your org exposed to CVE-2026-1874?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

References

https://jvn.jp/vu/JVNVU93286687/

jvn.jp

https://www.cisa.gov/news-events/ics-advisories/icsa-26-62-01

cisa.gov

https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf

mitsubishielectric.com

and 15 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-1874 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows