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CVE-2026-8806 Details

ANALYZED

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

Description

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.

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]	AdvisoryBroken Link
https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-06	[email protected]	AdvisoryBundleRemedy
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-440	Expected Behavior Violation	[email protected]

Affected Products

Product	Versions
Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP	<all versions>
CPE cpe:2.3:o:mitsubishielectric:fx5-enet/ip_firmware:::::::: cpe:2.3:h:mitsubishielectric:fx5-enet/ip:::::::: Remediation 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). The manual can be downloaded from https://www.mitsubishielectric.com/fa/download/index.html. 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. Upgrade: FX5-EIPmoderate effort

Product

Versions

Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP

CPE

cpe:2.3:o:mitsubishielectric:fx5-enet/ip_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:fx5-enet/ip:*:*:*:*:*:*:*:*

Remediation

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). The manual can be downloaded from https://www.mitsubishielectric.com/fa/download/index.html.
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.
Upgrade: FX5-EIPmoderate effort

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]