Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mitsubishielectric | Melsec Iq-F Fx5-Eip Firmware | <= 1.000 |
| Mitsubishielectric | Melsec Iq-F Fx5-Eip | - |
| Mitsubishielectric | Melsec Iq-F Fx5-Enet\/Ip Firmware | <= 1.106 |
| Mitsubishielectric | Melsec Iq-F Fx5-Enet\/Ip | - |
Related Weaknesses (CWE)
References
- https://jvn.jp/vu/JVNVU93286687/Third Party Advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-62-01Third Party Advisory
- https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdfVendor Advisory
FAQ
What is CVE-2026-1874?
CVE-2026-1874 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 Electri...
How severe is CVE-2026-1874?
CVE-2026-1874 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-1874?
Check the references section above for vendor advisories and patch information. Affected products include: Mitsubishielectric Melsec Iq-F Fx5-Eip Firmware, Mitsubishielectric Melsec Iq-F Fx5-Eip, Mitsubishielectric Melsec Iq-F Fx5-Enet\/Ip Firmware, Mitsubishielectric Melsec Iq-F Fx5-Enet\/Ip.