Description
Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by continuously sending a large number of communication packets to the Ethernet port of the product in a short period of time, increasing the processing load of the product, preventing the internal anomaly-detection processing from being performed, and causing the communication function to stop.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mitsubishi Electric | Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP | All versions | — |
Advisories 1
- ICSA-26-169-06 Mitsubishi Electric Co.'s MELSEC iQ-F Series FX5-ENET/IP Ethernet Module CISA ICS & IT advisories · Jun 18, 2026
References
- https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf vendor-advisory
- https://jvn.jp/vu/JVNVU97140216/ government-resource
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-06 government-resource