CVE-2025-3755: Information Disclosure and Denial-of-Service(DoS) Vulnerability in MELSEC iQ-F Series CPU module

Published May 29, 2025
·
Updated

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 Software

7 affected components
Mitsubishi Electric MELSEC iQ-F Series CPU Module
: Mitsubishi Electric FX5U-xMy/z x=32, 64, 80, y=T, R, z=ES,DS, ESS, DSS
: Mitsubishi Electric FX5UC-xMy/z x=32, 64, 96, y=T, z=D, DSS
: Mitsubishi Electric FX5UC-32MT/DS-TS, FX5UC-32MT/DSS-TS, FX5UC-32MR/DS-TS
: Mitsubishi Electric FX5UJ-xMy/z x=24, 40, 60, y=T, R, z=ES,DS,ESS,DSS
: Mitsubishi Electric FX5UJ-xMy/ES-A[Note *1] x=24, 40, 60, y=T, R
: Mitsubishi Electric FX5S-xMy/z x=30, 40, 60, 80[Note *1], y=T, R, z= ES,DS,ESS,DSS

Event History

May 29, 2025
CVE Published
via MITRE·04:47 AM
Data Sourced
via MITRE·04:47 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:15 AM
DescriptionSeverityWeakness
Aug 27, 2025
Data Sourced
via ICS·08:12 AM
SeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2025-3755?

CVE-2025-3755 is rated as a high severity vulnerability due to its ability to allow remote unauthenticated access and potential Denial-of-Service conditions.

2

How do I fix CVE-2025-3755?

To fix CVE-2025-3755, implement the recommended patches and updates provided by Mitsubishi Electric for the MELSEC iQ-F Series CPU modules.

3

What types of attacks can be executed using CVE-2025-3755?

Exploiting CVE-2025-3755 can enable attackers to read sensitive information and create Denial-of-Service (DoS) conditions.

4

Who is affected by CVE-2025-3755?

CVE-2025-3755 affects users of the Mitsubishi Electric MELSEC iQ-F Series CPU modules.

5

Can CVE-2025-3755 be exploited remotely?

Yes, CVE-2025-3755 can be exploited by remote unauthenticated attackers, increasing its risk for users.

Contact

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