Medium severity · published Aug 25, 2025
CVE-2025-5514
Denial-of-Service(DoS) Vulnerability in Web server function on MELSEC iQ-F Series CPU module
5.3
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
MELSEC iQ-F Series FX5S-30MR/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-30MT/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-30MT/ESS · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-40MR/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-40MT/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-40MT/ESS · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-60MR/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-60MT/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5S-60MT/ESS · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5U-32MR/DS · Mitsubishi Electric Corporation
1.060 and later · source: vendor
MI
MELSEC iQ-F Series FX5U-32MR/ES · Mitsubishi Electric Corporation
1.060 and later · source: vendor
MI
MELSEC iQ-F Series FX5U-32MT/DS · Mitsubishi Electric Corporation
1.060 and later · source: vendor
Affected product
MI
MELSEC iQ-F Series FX5S-30MR/ES
Mitsubishi Electric Corporation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-5514
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-5514
jvn.jp
https://jvn.jp/vu/JVNVU90316328/
www.cisa.gov
https://www.cisa.gov/news-events/ics-advisories/icsa-25-233-01
www.mitsubishielectric.com
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-010_en.pdf
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