CVE-2026-1876 — HIGH (7.5) — White Hats Nepal

Vulnerability Description

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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Mitsubishielectric	Melsec Iq-F Fx5-Enet\/Ip Firmware	All versions
Mitsubishielectric	Melsec Iq-F Fx5-Enet\/Ip	-

Related Weaknesses (CWE)

CWE-404

References

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

FAQ

What is CVE-2026-1876?

CVE-2026-1876 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 denia...

How severe is CVE-2026-1876?

CVE-2026-1876 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-1876?

Check the references section above for vendor advisories and patch information. Affected products include: Mitsubishielectric Melsec Iq-F Fx5-Enet\/Ip Firmware, Mitsubishielectric Melsec Iq-F Fx5-Enet\/Ip.