Critical severity · published May 29, 2025
CVE-2025-3755
Information Disclosure and Denial-of-Service(DoS) Vulnerability in MELSEC iQ-F Series CPU module
9.1
CVSS
0.9%
EPSS
No
On KEV
Description
Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU modules allows a remote unauthenticated attacker to read information in the product, to cause a Denial-of-Service (DoS) condition in MELSOFT connection, or to stop the operation of the CPU module (causing a DoS condtion on the CPU module), by sending specially crafted packets. The product is needed to reset for recovery.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% 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
All versions · source: vendor
MI
MELSEC iQ-F Series FX5U-32MR/ES · Mitsubishi Electric Corporation
All versions · source: vendor
MI
MELSEC iQ-F Series FX5U-32MT/DS · Mitsubishi Electric Corporation
All versions · source: vendor
Affected product
MI
MELSEC iQ-F Series FX5S-30MR/ES
Mitsubishi Electric Corporation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-3755
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-3755
jvn.jp
https://jvn.jp/vu/JVNVU94070048/
www.cisa.gov
https://www.cisa.gov/news-events/ics-advisories/icsa-25-153-03
www.mitsubishielectric.com
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-003_en.pdf
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