CVE-2026-8805

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.

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-190

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-26-169-05
• https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-002_en.pdf

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