# CVE-2026-1874

## Summary

- **CVE ID:** CVE-2026-1874
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-670
- **Published:** Mar 3, 2026
- **Last Modified:** Apr 24, 2026

## 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.

## Affected Products

- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP (versions 1.106 and prior)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP (versions 1.000 and prior)

## References

- [CNA](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf)
- [CNA](https://jvn.jp/vu/JVNVU93286687/)
- [CNA](https://www.cisa.gov/news-events/ics-advisories/icsa-26-62-01)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._