# CVE-2026-8806

## Summary

- **CVE ID:** CVE-2026-8806
- **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-440
- **Published:** Jun 19, 2026
- **Last Modified:** Jun 22, 2026

## 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

- Mitsubishi Electric Corporation — Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP (All versions)

## References

- [CNA](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf)
- [CNA](https://jvn.jp/vu/JVNVU97140216/)
- [CNA](https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-06)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.64%
- **EPSS Percentile:** 48.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._