PT-2026-22724 · Mitsubishi · Melsec Iq-F Series Fx5-Enet/Ip

Published 2026-03-03 · Updated 2026-04-30 · CVE-2026-1876

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 FX5-ENET/IP (affected versions not specified)

Description An improper resource shutdown or release issue exists in the Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP. A remote attacker can cause a denial-of-service (DoS) condition by continuously sending UDP packets to the product. A system reset is required for recovery.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

CVE-2026-1876

Affected Products

Melsec Iq-F Series Fx5-Enet/Ip

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-1876 · Security Note
• https://mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf · Vendor Advisory
• https://twitter.com/CVEnew/status/2028741154137657801 · Twitter Post
• https://t.me/cveNotify/153894 · Telegram Post
• https://cisa.gov/news-events/ics-advisories/icsa-26-62-01 · Note
• https://t.me/CVEtracker/46188 · Telegram Post
• https://jvn.jp/vu/JVNVU93286687 · Note
• https://t.me/cveNotify/154090 · Telegram Post
• https://t.me/cveNotify/161637 · Telegram Post