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Vulnerability · Published Jul 11, 2025 · Assigned by Mitsubishi

CVE-2025-5241Denial-of-Service Vulnerability in MELSEC iQ-F Series

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 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 61.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series allows a remote unauthenticated attacker to lockout legitimate users for a certain period by repeatedly attempting to login with incorrect passwords. The legitimate users will be unable to login until a certain period has passed after the lockout or until the product is reset.

Affected products (as reported)

VendorProductVersions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ESS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DSS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ESS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DSS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/ES All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/DS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/D All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/D All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/DSS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/D All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/DSS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS All versions
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS All versions
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-645 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References