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Vulnerability record · CVE-2026-8805 · published 19 June 2026

CVE-2026-8805: Integer overflow vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.64% · top 51.5% CWE-190 · Integer overflow Deferred
8.7CVSS 4.0 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
22 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-8805), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.