CVE-2025-5514 json
Denial-of-Service(DoS) Vulnerability in Web server function on MELSEC iQ-F Series CPU module
published 2025-08-25 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-25657
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-25-233-01 updated cvss 5.3
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module (Update A)
-
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MR/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MR/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-30MT/ESSaffected: mitigation “Use a firewall or virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required.” mitsubishielectric.com
+34 more productsfewer
Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MR/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MR/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-40MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MR/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MR/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-60MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MR/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MR/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/DS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/ES Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5S-80MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MR/DS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MR/ES >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/DS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/DSS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/ES >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-32MT/ESS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MR/DS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MR/ES >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/DS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/DSS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/ES >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-64MT/ESS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MR/DS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MR/ES >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MT/DS >=1.060 Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module FX5U-80MT/DSS >=1.060
35 more affected in the full advisory
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 14 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
Affected products
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ESS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ESS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/D
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/D
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/D
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ESS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MR/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MR/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ESS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MR/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MR/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ESS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/DSS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MR/ES
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MR/DS
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES-A
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MR/ES-A
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ES-A
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MR/ES-A
- Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ES-A
Classification
- Weakness
-
- CWE-130 Improper Handling of Length Parameter Inconsistency
References
-
mitsubishielectric.com
/psirt/vulnerability/pdf/2025-010_en.pdf
vendor-advisory
-
jvn.jp
/vu/JVNVU90316328/
government-resource
-
cisa.gov
/news-events/ics-advisories/icsa-25-233-01
government-resource
Sources
- CVE List CVE-2025-5514
- NVD CVE-2025-5514
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