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.
References (3)
Core 3
Core References
Various Sources vendor-advisory
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-014_en.pdf
Third Party Advisory government-resource
https://jvn.jp/vu/JVNVU92088475/
Third Party Advisory, US Government Resource government-resource
https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-01
Scores
CVSS v3
5.3
EPSS
0.0037
EPSS Percentile
28.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1284
Status
published
Products (50)
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MR/DS
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MR/ES
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MR/ES-A
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MT/DS
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MT/DSS
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MT/ES
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MT/ES-A
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-30MT/ESS
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-40MR/DS
All versions
Mitsubishi Electric Corporation/MELSEC iQ-F Series FX5S-40MR/ES
All versions
... and 40 more
Published
Nov 06, 2025
Tracked Since
Feb 18, 2026