CVE-2025-5514: Denial-of-Service(DoS) Vulnerability in Web server function on MELSEC iQ-F Series CPU module
Published Aug 25, 2025
·Updated
Improper Handling of Length Parameter Inconsistency vulnerability in web server function on Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module allows a remote unauthenticated attacker to delay the processing of the web server function and prevent legitimate users from utilizing the web server function, by sending a specially crafted HTTP request.
Affected Software
76 affected components
Mitsubishi Electric MELSEC iQ-F Series CPU Module
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/ES>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/DS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/ESS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/DSS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MR/ES>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MR/DS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/ES>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/DS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/ESS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/DSS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MR/ES>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MR/DS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MT/ES>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MT/DS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MT/ESS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MT/DSS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MR/ES>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MR/DS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-32MT/D>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-32MT/DSS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-64MT/D>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-64MT/DSS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-96MT/D>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-96MT/DSS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-32MT/DS-TS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-32MT/DSS-TS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UC-32MR/DS-TS>=1.060
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MR/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MR/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MR/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MT/ES-A
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-24MR/ES-A
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MT/ES-A
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-40MR/ES-A
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MT/ES-A
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5UJ-60MR/ES-A
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MR/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MR/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MR/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/ESS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/DSS
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MR/DS
Event History
Aug 25, 2025
CVE Published
via MITRE·05:55 AM
Data Sourced
via MITRE·05:55 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:15 AM
DescriptionSeverityWeakness
Sep 10, 2025
Data Sourced
via ICS·06:07 AM
SeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2025-5514?
The severity of CVE-2025-5514 is categorized as medium due to its potential impact on service availability.
2
How do I fix CVE-2025-5514?
To fix CVE-2025-5514, you should apply the latest firmware update from Mitsubishi Electric for the affected MELSEC iQ-F Series CPU module.
3
Which systems are affected by CVE-2025-5514?
CVE-2025-5514 affects various models of the Mitsubishi Electric MELSEC iQ-F Series CPU modules, specifically versions 1.060 and above.
4
What type of attack does CVE-2025-5514 enable?
CVE-2025-5514 allows remote unauthenticated attackers to exploit the vulnerability to cause delays in web server function processing.
5
Is CVE-2025-5514 easily exploitable?
Yes, CVE-2025-5514 is considered easily exploitable since it does not require authentication for an attack.