CVE-2026-8806

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS

0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-25)

CWE

CWE-440

Published

2026-06-19

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

References

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

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