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CVE-2026-8805 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://jvn.jp/vu/JVNVU97140216/	[email protected]	AdvisoryBundleRemedy
https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-05	[email protected]	AdvisoryVendor
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-002_en.pdf	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	[email protected]

Affected Products

Product	Versions
Mitsubishi Electric MELSEC iQ-F FX5-EIP	<= 1.000
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 1.001moderate efforthttps://www.mitsubishielectric.com/fa/download/index.html Workaround:low effort Use a firewall, virtual private network (VPN), etc. to prevent unauthorized access when internet access is required. Workaround:low effort Use the affected product within a LAN and block access from untrusted networks and hosts through firewalls. Workaround:low effort Use the IP filter function of the affected product to block access from untrusted hosts. For details on the IP filter function, refer to "13.1 IP Filter Function" in the MELSEC iQ-F FX5 User’s Manual (Communication). Workaround:low effort Restrict physical access to the affected product, as well as to PCs and network devices to which it is connected. Workaround:low effort Install anti-virus software on PCs that can access the affected product.

Product

Versions

Mitsubishi Electric MELSEC iQ-F FX5-EIP

<= 1.000

CPE

No CPEs found in CPE dictionary for this product.

Remediation

Upgrade: 1.001moderate efforthttps://www.mitsubishielectric.com/fa/download/index.html
Workaround:low effort
Use a firewall, virtual private network (VPN), etc. to prevent unauthorized access when internet access is required.
Workaround:low effort
Use the affected product within a LAN and block access from untrusted networks and hosts through firewalls.
Workaround:low effort
Use the IP filter function of the affected product to block access from untrusted hosts. For details on the IP filter function, refer to "13.1 IP Filter Function" in the MELSEC iQ-F FX5 User’s Manual (Communication).
Workaround:low effort
Restrict physical access to the affected product, as well as to PCs and network devices to which it is connected.
Workaround:low effort
Install anti-virus software on PCs that can access the affected product.

Change History

2 change records found show changes

Date	Action	Recorded By
Jun 22, 2026	CVE Modified	CISA-ADP
Jun 19, 2026	New CVE Received	[email protected]