Mitsubishi Electric FX5U-32MT-ES 5.3 overly restrictive account lockout mechanism

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Mitsubishi Electric FX5U-32MT-ES, FX5U-32MT-DS, FX5U-32MT-ESS, FX5U-32MT-DSS, FX5U-32MR-ES, FX5U-32MR-DS, FX5U-64MT-ES, FX5U-64MT-DS, FX5U-64MT-ESS, FX5U-64MT-DSS, FX5U-64MR-ES, FX5U-64MR-DS, FX5U-80MT-ES, FX5U-80MT-DS, FX5U-80MT-ESS, FX5U-80MT-DSS, FX5U-80MR-ES, FX5U-80MR-DS, FX5UC-32MT-D, FX5UC-32MT-DSS, FX5UC-64MT-D, FX5UC-64MT-DSS, FX5UC-96MT-D, FX5UC-96MT-DSS, FX5UC-32MT-DS-TS, FX5UC-32MT-DSS-TS, FX5UC-32MR-DS-TS, FX5UJ-24MT-ES, FX5UJ-24MT-DS, FX5UJ-24MT-ESS, FX5UJ-24MT-DSS, FX5UJ-24MR-ES, FX5UJ-24MR-DS, FX5UJ-40MT-ES, FX5UJ-40MT-DS, FX5UJ-40MT-ESS, FX5UJ-40MT-DSS, FX5UJ-40MR-ES, FX5UJ-40MR-DS, FX5UJ-60MT-ES, FX5UJ-60MT-DS, FX5UJ-60MT-ESS, FX5UJ-60MT-DSS, FX5UJ-60MR-ES, FX5UJ-60MR-DS, FX5UJ-24MT-ES-A, FX5UJ-24MR-ES-A, FX5UJ-40MT-ES-A, FX5UJ-40MR-ES-A, FX5UJ-60MT-ES-A, FX5UJ-60MR-ES-A, FX5S-30MT-ES, FX5S-30MT-DS, FX5S-30MT-ESS, FX5S-30MT-DSS, FX5S-30MR-ES, FX5S-30MR-DS, FX5S-40MT-ES, FX5S-40MT-DS, FX5S-40MT-ESS, FX5S-40MT-DSS, FX5S-40MR-ES, FX5S-40MR-DS, FX5S-60MT-ES, FX5S-60MT-DS, FX5S-60MT-ESS, FX5S-60MT-DSS, FX5S-60MR-ES, FX5S-60MR-DS, FX5S-80MT-ES, FX5S-80MT-ESS, FX5S-80MR-ES and FX5-CCLGN-MS 5.3. Affected by this vulnerability is an unknown functionality. The manipulation results in overly restrictive account lockout mechanism. This vulnerability is known as CVE-2025-5241. It is possible to launch the attack remotely. No exploit is available. Applying restrictive firewalling is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Mitsubishi Electric FX5U-32MT-ES, FX5U-32MT-DS, FX5U-32MT-ESS, FX5U-32MT-DSS, FX5U-32MR-ES, FX5U-32MR-DS, FX5U-64MT-ES, FX5U-64MT-DS, FX5U-64MT-ESS, FX5U-64MT-DSS, FX5U-64MR-ES, FX5U-64MR-DS, FX5U-80MT-ES, FX5U-80MT-DS, FX5U-80MT-ESS, FX5U-80MT-DSS, FX5U-80MR-ES, FX5U-80MR-DS, FX5UC-32MT-D, FX5UC-32MT-DSS, FX5UC-64MT-D, FX5UC-64MT-DSS, FX5UC-96MT-D, FX5UC-96MT-DSS, FX5UC-32MT-DS-TS, FX5UC-32MT-DSS-TS, FX5UC-32MR-DS-TS, FX5UJ-24MT-ES, FX5UJ-24MT-DS, FX5UJ-24MT-ESS, FX5UJ-24MT-DSS, FX5UJ-24MR-ES, FX5UJ-24MR-DS, FX5UJ-40MT-ES, FX5UJ-40MT-DS, FX5UJ-40MT-ESS, FX5UJ-40MT-DSS, FX5UJ-40MR-ES, FX5UJ-40MR-DS, FX5UJ-60MT-ES, FX5UJ-60MT-DS, FX5UJ-60MT-ESS, FX5UJ-60MT-DSS, FX5UJ-60MR-ES, FX5UJ-60MR-DS, FX5UJ-24MT-ES-A, FX5UJ-24MR-ES-A, FX5UJ-40MT-ES-A, FX5UJ-40MR-ES-A, FX5UJ-60MT-ES-A, FX5UJ-60MR-ES-A, FX5S-30MT-ES, FX5S-30MT-DS, FX5S-30MT-ESS, FX5S-30MT-DSS, FX5S-30MR-ES, FX5S-30MR-DS, FX5S-40MT-ES, FX5S-40MT-DS, FX5S-40MT-ESS, FX5S-40MT-DSS, FX5S-40MR-ES, FX5S-40MR-DS, FX5S-60MT-ES, FX5S-60MT-DS, FX5S-60MT-ESS, FX5S-60MT-DSS, FX5S-60MR-ES, FX5S-60MR-DS, FX5S-80MT-ES, FX5S-80MT-ESS, FX5S-80MR-ES and FX5-CCLGN-MS 5.3. Affected is some unknown functionality. The manipulation with an unknown input leads to a overly restrictive account lockout mechanism vulnerability. CWE is classifying the issue as CWE-645. The product contains an account lockout protection mechanism, but the mechanism is too restrictive and can be triggered too easily, which allows attackers to deny service to legitimate users by causing their accounts to be locked out. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is shared for download at cisa.gov. This vulnerability is traded as CVE-2025-5241. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

It is possible to mitigate the weakness by firewalling .

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-21089). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Overly restrictive account lockout mechanism
CWE: CWE-645 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/03/2025 Advisory disclosed
07/03/2025 +0 days VulDB entry created
07/11/2025 +8 days VulDB entry last update

Sourcesinfo

Advisory: icsa-25-184-04
Status: Confirmed

CVE: CVE-2025-5241 (🔒)
GCVE (CVE): GCVE-0-2025-5241
GCVE (VulDB): GCVE-100-314820
EUVD: 🔒

Entryinfo

Created: 07/03/2025 21:57
Updated: 07/11/2025 12:04
Changes: 07/03/2025 21:57 (50), 07/11/2025 04:46 (1), 07/11/2025 12:04 (10)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!