CVE-2026-1876 HIGH

CVE-2026-1876: Denial-of-Service (DoS) vulnerability in Ethernet function of MELSEC iQ-F Series Ethernet module

Vendor Mitsubishi Electric Corporation
Product MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP
Weakness CWE-404
Published March 3, 2026
Last update March 4, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition on the products by continuously sending UDP packets to the products. A system reset of the product is required for recovery.

Key dates

02Disclosure timeline

March 3, 2026 CVE published
March 4, 2026 Record updated