# CVE-2025-3755

## Summary

- **CVE ID:** CVE-2025-3755
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H)
- **CWE:** CWE-1285
- **Published:** May 29, 2025
- **Last Modified:** Mar 12, 2026

## Description

Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU modules allows a remote unauthenticated attacker to read information in the product, to cause a Denial-of-Service (DoS) condition in MELSOFT connection, or to stop the operation of the CPU module (causing a DoS condtion on the CPU module), by sending specially crafted packets. The product is needed to reset for recovery.

## Affected Products

- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-32MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-32MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-32MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-32MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-32MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-32MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-64MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-64MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-64MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-64MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-64MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-64MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-80MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-80MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-80MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-80MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-80MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5U-80MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-32MT/D (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-32MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-64MT/D (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-64MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-96MT/D (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-96MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-32MT/DS-TS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-32MT/DSS-TS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UC-32MR/DS-TS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MT/ES-A (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-24MR/ES-A (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MT/ES-A (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-40MR/ES-A (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MT/ES-A (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5UJ-60MR/ES-A (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-30MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-30MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-30MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-40MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-40MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-40MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-60MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-60MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-60MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-80MT/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-80MT/ESS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-80MR/ES (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-30MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-30MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-30MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-40MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-40MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-40MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-60MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-60MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-60MR/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-80MT/DS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-80MT/DSS (All versions)
- Mitsubishi Electric Corporation — MELSEC iQ-F Series FX5S-80MR/DS (All versions)

## References

- [CNA](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-003_en.pdf)
- [CNA](https://jvn.jp/vu/JVNVU94070048/)
- [CNA](https://www.cisa.gov/news-events/ics-advisories/icsa-25-153-03)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.83%
- **EPSS Percentile:** 55.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._