CVE-2026-1876

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.

Score

CVSS 4.0 8.7 High

Status

Analyzed - Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp

Published

2026-03-03

Last modified

2026-03-04

Weaknesses

CWE-404

Affected products

• Melsec Iq-f Series Fx5-enetip Ethernet Module Fx5-enetip (Mitsubishi Electric Corporation)
• Melsec Iq-f Fx5-enet/ip Firmware (Mitsubishielectric)

References

• https://jvn.jp/vu/JVNVU93286687/
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-62-01
• https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-021_en.pdf