CVE-2026-8805

Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series EtherNet/IP module

HIGH
8.7
CVSS Score
Published: June 19, 2026 at 02:26 AM UTC
Updated: October 26, 2026 at 11:10 AM UTC
1 product affected across 1 vendorMELSEC iQ-F FX5-EIP

Using Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP by Mitsubishi Electric Corporation?

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Severity
HIGH8.7
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHMitsubishi
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-190

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