Auth bypass in Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mr/ds

CVE-2025-7405

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module allows a remote unauthenticated attacker to read or write the device values of the product and stop the operation of the programs, since MODBUS/TCP in the products does not have authentication features.

Vulnerability class: Broken Authentication

EPSS: 0.005 (37.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-7405?
CVE-2025-7405 is a high-severity vulnerability in Mitsubishi Electric Corporation Melsec Iq-F Series Fx5s-30mr/ds, classified under Missing Authentication for Critical Function. CVSS score: 7.3/10. Published 2025-09-01.
How severe is CVE-2025-7405?
High severity. CVSS v3 base score is 7.3 out of 10.