Description
Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric 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 in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mitsubishi Electric | Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP | versions 1.000 and prior | — |
Advisories 1
- ICSA-26-169-05 Mitsubishi Electric MELSEC iQ-F Series CISA ICS & IT advisories · Jun 18, 2026
References
- https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-002_en.pdf vendor-advisory
- https://jvn.jp/vu/JVNVU97140216/ government-resource
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-05 government-resource