Is CVE-2026-8805 actively exploited?

No active exploitation of CVE-2026-8805 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-8805 be exploited remotely?

Yes. CVE-2026-8805 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-8805?

CVE-2026-8805 has a CVSS score of 8.7 (HIGH).

HOME VULNERABILITIESCVE-2026-8805

HIGH

CVE-2026-8805

CWE-190Published: June 19, 2026· Updated: Jun 22, 2026

8.7

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-8805 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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:X/V:X/RE:X/U:X

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Exploit-DB

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GitHub PoC Search

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Rapid7 / Metasploit

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PacketStorm

Security advisories & exploits

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News & Research Mentioning CVE-2026-8805

Mitsubishi Electric MELSEC iQ-F Series

CISA Alerts· Jun 18, 2026

View CSAF Summary Successful exploitation of this vulnerability could allow 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. The following versions of Mitsubishi Electric MELSEC iQ-F Series are affected: MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP <=1.000 (CVE-2026-8805) CVSS Vendor Equipment Vulnerabilities v3 7.5 Mitsubishi Electric Mitsubishi Electric MELSEC iQ-F Series Integer Overflow or Wraparound Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Head [xlite_meta score:73 src:CISA Alerts xlite_fp:dfa5fe70e88b1e75e3d440d7d724332da0bb379f8e77ce1192aad519705da16a]