PT-2026-22722 · Mitsubishi · Melsec Iq-F Series Ethernet/Ip Module Fx5-Enet/Ip

Published 2026-03-03 · Updated 2026-03-04 · CVE-2026-1874

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module versions 1.106 and prior Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-EIP EtherNet/IP Module (affected versions not specified)

Description An Always-Incorrect Control Flow Implementation issue exists that can lead to a denial-of-service (DoS) condition. A remote attacker can trigger this by sending UDP packets to the affected products. Recovery requires a system reset of the product.

Recommendations Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module versions prior to 1.107 Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-EIP EtherNet/IP Module (At the moment, there is no information about a newer version that contains a fix for this vulnerability.)

DoS

Weakness Enumeration

CWE-670

Related Identifiers

CVE-2026-1874

Affected Products

Melsec Iq-F Series Ethernet/Ip Module Fx5-Enet/Ip

References · 10

• https://mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1874 · Security Note
• https://t.me/CVEtracker/46191 · Telegram Post
• https://cisa.gov/news-events/ics-advisories/icsa-26-62-01 · Note
• https://t.me/cveNotify/154088 · Telegram Post
• https://jvn.jp/vu/JVNVU93286687 · Note
• https://twitter.com/cyberbivash/status/2028746252276400153 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2028757784003477690 · Twitter Post
• https://t.me/cveNotify/153892 · Telegram Post
• https://twitter.com/CVEnew/status/2028741156209582120 · Twitter Post