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Vulnerabilities

Vulnerability · CVE-2025-3755

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

Published May 29, 2025 · catalog updated Aug 27, 2025 · Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS

Check if you run it

No confirmed exploitation is on record for CVE-2025-3755. EPSS is 0.83%. Act only if a listed version of Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.83%
Remediation
Vendor / distro source
Affected products
vendor Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS All versions

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS All versionsAll versions

How to fix CVE-2025-3755

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-3755. EPSS is 0.83%. Act only if a listed version of Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS is installed.

Which versions are affected?

Compare what you have installed with Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS All versions All versions. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.83%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 29, 2025 · EUVD

    Detected

    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 speciall

  2. Aug 27, 2025 · EUVD

    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 speciall

Sources

  • CVE.orgVulnerability recordCVE-2025-3755

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-3755

    30-day exploitation probability 0.8%

    first.org
  • EUVDVulnerability recordEUVD-2025-16363

    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 MELSOF

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.