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Vulnerabilities

Vulnerability · CVE-2025-5241

Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series allows a remote unauthenticated attacker to lockout legitimate user

Published Jul 11, 2025 · catalog updated Jul 11, 2025 · Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-5241. EPSS is 0.45%. Act only if a listed version of Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS 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.

Same product and reporting

Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Vendor / distro source
Affected products
vendor Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS All versions

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.

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-60MT/ESS All versionsAll versions

How to fix CVE-2025-5241

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-2025-5241. EPSS is 0.45%. Act only if a listed version of Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS is installed.

Which versions are affected?

Compare what you have installed with Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS 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 0.45%. 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. Jul 11, 2025 · EUVD

    Detected

    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.

  2. Jul 11, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-5241

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-5241

    30-day exploitation probability 0.45%

    first.org
  • EUVDVulnerability recordEUVD-2025-21089

    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 us

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 19, 2026