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Vulnerabilities

Vulnerability · CVE-2025-5514

Improper Handling of Length Parameter Inconsistency vulnerability in web server function on Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module allows a remote unauthenti

Published Aug 25, 2025 · catalog updated Aug 26, 2025 · Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A

Last checked Oct 25, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-5514. EPSS is 0.59%. Act only if a listed version of Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A 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
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.59%
Remediation
Vendor / distro source
Affected products
vendor Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A All versions

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.

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 FX5UJ-24MT/ES-A All versionsAll versions

How to fix CVE-2025-5514

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-2025-5514. EPSS is 0.59%. Act only if a listed version of Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A is installed.

Which versions are affected?

Compare what you have installed with Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A 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 0.59%. 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. Aug 25, 2025 · EUVD

    Detected

    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.

  2. Aug 26, 2025 · EUVD

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-5514

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-5514

    30-day exploitation probability 0.59%

    first.org
  • EUVDVulnerability recordEUVD-2025-25657

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 25, 2026
  • CVE.orgOct 22, 2026
  • EUVDOct 22, 2026