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Vulnerability · Published Aug 25, 2025 · Assigned by Mitsubishi

CVE-2025-5514Denial-of-Service(DoS) Vulnerability in Web server function on MELSEC iQ-F Series CPU module

Medium 5.3

In plain English

A medium-severity security flaw in MELSEC iQ-F Series FX5S-30MR/ES from Mitsubishi Electric Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.6%top 51.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 products (as reported)

VendorProductVersions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ESS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DSS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/ES 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/DS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ES 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ESS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DSS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/ES 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/DS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/D 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/D 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/DSS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/D 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/DSS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS 1.060 and later
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ESS All versions

Weakness: CWE-130 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References