Medium severity · published Nov 6, 2025
CVE-2025-10259
Denial-of-Service(DoS) Vulnerability in TCP Communication Function on MELSEC iQ-F Series CPU module
5.3
CVSS
0.5%
EPSS
No
On KEV
Description
Improper Validation of Specified Quantity in Input vulnerability in TCP Communication Function on Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module allows a remote attacker to disconnect the connection by sending specially crafted TCP packets to cause a denial-of-service (DoS) condition on the products. There is no impact on connections other than the attacked one.
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)0.5% · higher than 39% 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-2025-10259
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-10259
jvn.jp
https://jvn.jp/vu/JVNVU92088475/
www.cisa.gov
https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-01
www.mitsubishielectric.com
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-014_en.pdf
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