What is CVE-2026-1876?

CVE-2026-1876 is a high-severity vulnerability in Mitsubishielectric Melsec Iq-F Fx5-Enet\/ip, classified under Improper Resource Shutdown or Release. CVSS score: 7.5/10. Published 2026-03-03.

How severe is CVE-2026-1876?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Mitsubishielectric Melsec Iq-F Fx5-Enet\/ip

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.

EPSS: 0.004 (35.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-404 — Improper Resource Shutdown or Release

References

Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (vendor-advisory, Vendor Advisory)
Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (Third Party Advisory, government-resource)
Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (Third Party Advisory, government-resource)

Frequently asked questions

What is CVE-2026-1876?: CVE-2026-1876 is a high-severity vulnerability in Mitsubishielectric Melsec Iq-F Fx5-Enet\/ip, classified under Improper Resource Shutdown or Release. CVSS score: 7.5/10. Published 2026-03-03.
How severe is CVE-2026-1876?: High severity. CVSS v3 base score is 7.5 out of 10.