#VU112177 Overly restrictive account lockout mechanism in Mitsubishi Electric products - CVE-2025-5241


Vulnerability identifier: #VU112177

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-5241

CWE-ID: CWE-645

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC iQ-F FX5U-32MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-32MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-32MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-32MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-32MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-32MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-64MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-64MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-64MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-64MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-64MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-64MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-80MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-80MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-80MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-80MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-80MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5U-80MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MT/D
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-64MT/D
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-64MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-96MT/D
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-96MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MT/DS-TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MT/DSS-TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MR/DS-TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MT/ES-A
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-24MR/ES-A
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MT/ES-A
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-40MR/ES-A
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MT/ES-A
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UJ-60MR/ES-A
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-30MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-30MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-30MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-30MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-30MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-30MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-40MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-40MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-40MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-40MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-40MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-40MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-60MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-60MT/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-60MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-60MT/DSS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-60MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-60MR/DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-80MT/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-80MT/ESS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S-80MR/ES
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5-CCLGN-MS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an overly restrictive account lockout mechanism. A remote attacker can lock out a legitimate user by continually attempting to login with an incorrect password.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MELSEC iQ-F FX5U-32MT/ES: All versions

MELSEC iQ-F FX5U-32MT/DS: All versions

MELSEC iQ-F FX5U-32MT/ESS: All versions

MELSEC iQ-F FX5U-32MT/DSS: All versions

MELSEC iQ-F FX5U-32MR/ES: All versions

MELSEC iQ-F FX5U-32MR/DS: All versions

MELSEC iQ-F FX5U-64MT/ES: All versions

MELSEC iQ-F FX5U-64MT/DS: All versions

MELSEC iQ-F FX5U-64MT/ESS: All versions

MELSEC iQ-F FX5U-64MT/DSS: All versions

MELSEC iQ-F FX5U-64MR/ES: All versions

MELSEC iQ-F FX5U-64MR/DS: All versions

MELSEC iQ-F FX5U-80MT/ES: All versions

MELSEC iQ-F FX5U-80MT/DS: All versions

MELSEC iQ-F FX5U-80MT/ESS: All versions

MELSEC iQ-F FX5U-80MT/DSS: All versions

MELSEC iQ-F FX5U-80MR/ES: All versions

MELSEC iQ-F FX5U-80MR/DS: All versions

MELSEC iQ-F FX5UC-32MT/D: All versions

MELSEC iQ-F FX5UC-32MT/DSS: All versions

MELSEC iQ-F FX5UC-64MT/D: All versions

MELSEC iQ-F FX5UC-64MT/DSS: All versions

MELSEC iQ-F FX5UC-96MT/D: All versions

MELSEC iQ-F FX5UC-96MT/DSS: All versions

MELSEC iQ-F FX5UC-32MT/DS-TS: All versions

MELSEC iQ-F FX5UC-32MT/DSS-TS: All versions

MELSEC iQ-F FX5UC-32MR/DS-TS: All versions

MELSEC iQ-F FX5UJ-24MT/ES: All versions

MELSEC iQ-F FX5UJ-24MT/DS: All versions

MELSEC iQ-F FX5UJ-24MT/ESS: All versions

MELSEC iQ-F FX5UJ-24MT/DSS: All versions

MELSEC iQ-F FX5UJ-24MR/ES: All versions

MELSEC iQ-F FX5UJ-24MR/DS: All versions

MELSEC iQ-F FX5UJ-40MT/ES: All versions

MELSEC iQ-F FX5UJ-40MT/DS: All versions

MELSEC iQ-F FX5UJ-40MT/ESS: All versions

MELSEC iQ-F FX5UJ-40MT/DSS: All versions

MELSEC iQ-F FX5UJ-40MR/ES: All versions

MELSEC iQ-F FX5UJ-40MR/DS: All versions

MELSEC iQ-F FX5UJ-60MT/ES: All versions

MELSEC iQ-F FX5UJ-60MT/DS: All versions

MELSEC iQ-F FX5UJ-60MT/ESS: All versions

MELSEC iQ-F FX5UJ-60MT/DSS: All versions

MELSEC iQ-F FX5UJ-60MR/ES: All versions

MELSEC iQ-F FX5UJ-60MR/DS: All versions

MELSEC iQ-F FX5UJ-24MT/ES-A: All versions

MELSEC iQ-F FX5UJ-24MR/ES-A: All versions

MELSEC iQ-F FX5UJ-40MT/ES-A: All versions

MELSEC iQ-F FX5UJ-40MR/ES-A: All versions

MELSEC iQ-F FX5UJ-60MT/ES-A: All versions

MELSEC iQ-F FX5UJ-60MR/ES-A: All versions

MELSEC iQ-F FX5S-30MT/ES: All versions

MELSEC iQ-F FX5S-30MT/DS: All versions

MELSEC iQ-F FX5S-30MT/ESS: All versions

MELSEC iQ-F FX5S-30MT/DSS: All versions

MELSEC iQ-F FX5S-30MR/ES: All versions

MELSEC iQ-F FX5S-30MR/DS: All versions

MELSEC iQ-F FX5S-40MT/ES: All versions

MELSEC iQ-F FX5S-40MT/DS: All versions

MELSEC iQ-F FX5S-40MT/ESS: All versions

MELSEC iQ-F FX5S-40MT/DSS: All versions

MELSEC iQ-F FX5S-40MR/ES: All versions

MELSEC iQ-F FX5S-40MR/DS: All versions

MELSEC iQ-F FX5S-60MT/ES: All versions

MELSEC iQ-F FX5S-60MT/DS: All versions

MELSEC iQ-F FX5S-60MT/ESS: All versions

MELSEC iQ-F FX5S-60MT/DSS: All versions

MELSEC iQ-F FX5S-60MR/ES: All versions

MELSEC iQ-F FX5S-60MR/DS: All versions

MELSEC iQ-F FX5S-80MT/ES: All versions

MELSEC iQ-F FX5S-80MT/ESS: All versions

MELSEC iQ-F FX5S-80MR/ES: All versions

MELSEC iQ-F FX5-CCLGN-MS: All versions

External links
https://www.cisa.gov/news-events/ics-advisories/icsa-25-184-04

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability


Overly restrictive account lockout mechanism in Mitsubishi Electric MELSEC iQ-F Series