melsec iq-f

About this tag
The MELSEC iQ-F tag on WindowsForum.com covers security vulnerabilities and mitigation guidance for Mitsubishi Electric's MELSEC iQ-F Series programmable logic controllers (PLCs) and related modules. Discussions focus on high-impact flaws such as denial-of-service (DoS) vulnerabilities in EtherNet/IP and Ethernet modules, cleartext credential exposure over SLMP (CVE-2025-7731), unauthenticated Modbus/TCP access (CVE-2025-7405), and OPC-related issues (CVE-2024-0727). Content includes CISA advisories, vendor disclosures, and practical steps for Windows-based IT/OT teams to harden networks, apply patches, and reduce risk. Recurring themes include remote exploitation, lack of authentication, and the need for immediate operational attention in industrial environments.

  1. CVE-2026-8806 FX5-ENET/IP: Unpatched DoS Threat to Industrial Availability

    On June 18, 2026, CISA republished Mitsubishi Electric’s advisory for CVE-2026-8806, a high-severity denial-of-service flaw affecting all versions of the MELSEC iQ-F Series FX5-ENET/IP Ethernet module used in industrial control networks worldwide, with no firmware fix currently planned. The...
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    • denial of service industrial cybersecurity melsec iq-f ot networking
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  2. CVE-2026-8805 FX5-EIP DoS: Patch MELSEC iQ-F v1.001 and Lock Down Ethernet/IP

    Mitsubishi Electric and CISA disclosed on June 18, 2026, that MELSEC iQ-F Series FX5-EIP EtherNet/IP modules running version 1.000 or earlier are vulnerable to a remotely triggerable denial-of-service flaw tracked as CVE-2026-8805. The fix is firmware version 1.001 or later, but the more...
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    • denial of service ethernet/ip security industrial cybersecurity melsec iq-f
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  3. OT DoS Alert: MELSEC iQ‑F FX5 ENET/IP and FX5 EIP UDP Flood Flaws

    Mitsubishi Electric has disclosed a cluster of high‑impact denial‑of‑service vulnerabilities affecting the MELSEC iQ‑F Series EtherNet/IP and Ethernet modules that, if left unmitigated, can be weaponized by a remote attacker to render communications unavailable and force a device reset — with...
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    • industrial cybersecurity melsec iq-f ot security udp flood vulnerabilities
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  4. MELSEC iQ-F SLMP Cleartext Exposure: Urgent OT Security Fixes (CVE-2025-7731)

    A remote information‑disclosure weakness in Mitsubishi Electric’s MELSEC iQ‑F series CPU modules has been publicly described as a cleartext transmission of sensitive information over SLMP, enabling an attacker with network access to capture credentials and potentially read/write device values or...
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    • cisa cve-2025-7731 cwe-319 edr industrial control systems information disclosure ip filtering melsec iq-f mitsubishi electric network segmentation ot security plc vulnerabilities remote access slmp vpn mitigation windows ot windows security
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  5. CISA ICS Advisories Aug 28 2025: 9 Critical Vulnerabilities Across OT Vendors

    CISA on August 28, 2025, published a batch of nine Industrial Control Systems (ICS) advisories covering critical vulnerabilities across Mitsubishi Electric, Schneider Electric, Delta Electronics, GE Vernova, Hitachi Energy, and ICONICS/Mitsubishi integrations — a coordinated disclosure that...
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    • cisa cncsoft-g2 commgr cve-2025-0921 cve-2025-47728 cve-2025-53418 cve-2025-53419 cve-2025-7405 cve-2025-7731 cve-2025-8453 genesis64 ics industrial control systems melsec iq-f network segmentation ot security patch management relion vulnerability windows tools
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    • Forum: Security Alerts

  6. MELSEC iQ-F Modbus/TCP CVE-2025-7405: Mitigation Guide for Windows & OT

    Mitsubishi Electric’s MELSEC iQ‑F family of CPU modules has been formally flagged with a network‑accessible vulnerability that allows unauthenticated remote actors to read and write device values — and in some deployments to halt program execution — because the affected product’s Modbus/TCP...
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    • asset inventory cisa cve-2025-7405 cwe-306 cybersecurity firmware ics security industrial control systems ip filtering jump-host melsec iq-f mitsubishi electric vulnerability modbus/tcp network segmentation plc vulnerabilities remote maintenance security siem monitoring vpn windows ot
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  7. CISA: 3 Urgent ICS/Medical Advisories (MELSEC iQ-F, Mitsubishi AC, Synapse Mobility)

    CISA’s August 21, 2025 advisory bundle added three urgent entries to the growing list of industrial control system (ICS) and medical-device vulnerabilities security teams must treat as high priority this month. The agency published advisories for a denial-of-service vector in the Mitsubishi...
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    • air conditioning controllers cisa cve-2025-3699 cve-2025-54551 cve-2025-5514 denial of service fujifilm ics industrial control systems ip filtering medical devices melsec iq-f mitsubishi electric network segmentation patch management security bypass synapse vulnerability web interface
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  8. Mitsubishi Electric MELSEC iQ-F FX5-OPC Vulnerability: What You Need to Know

    In a world where cybersecurity predicates the integrity of critical manufacturing processes, Mitsubishi Electric has recently raised alarms regarding a serious vulnerability in its MELSEC iQ-F FX5-OPC devices. This vulnerability, cataloged as CVE-2024-0727, possesses a CVSS score of 7.5...
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    • cve vulnerabilities cybersecurity dos melsec iq-f mitsubishi electric
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