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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.

PUBLISHED Reserved 2026-05-18 | Published 2026-06-19 | Updated 2026-06-22 | Assigner Mitsubishi




HIGH: 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

Problem types

CWE-190 Integer Overflow or Wraparound

Product status

Default status
unaffected

versions 1.000 and prior
affected

References

www.mitsubishielectric.com/...nerability/pdf/2026-002_en.pdf vendor-advisory

jvn.jp/vu/JVNVU97140216/ government-resource

www.cisa.gov/news-events/ics-advisories/icsa-26-169-05 government-resource

cve.org (CVE-2026-8805)

nvd.nist.gov (CVE-2026-8805)

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