CVE-2025-3755

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

9.1 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: High

Exploit likelihood

0.86%Up 0.8 points since May 29, 2025

What each source reports

CVE List Score used 9.1

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

Record: CVE-2025-3755
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-1285
Updated: 2026-11-02

EUVDEUVD-2025-16363 9.1

Record: EUVD-2025-16363
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-7r2m-8qrj-39h4 9.1

Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Mitsubishi...

Record: GHSA-7r2m-8qrj-39h4
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-1285
Updated: 2026-11-02

NVD 9.1

Record: CVE-2025-3755
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-1285
Updated: 2026-11-02

Affected products

Show 63 moreShow less

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-3755 is a critical vulnerability (CVSS 9.1) in Mitsubishi Electric Corporation Melsec Iq-f Series Fx5s-30mr/ds, published May 29, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.86%, the 58th percentile. No source names a fixed version.