Medium 5.3Published Nov 6, 2025

CVE-2025-10259Denial-of-Service(DoS) Vulnerability in TCP Communication Function on MELSEC iQ-F Series CPU module

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES and 59 other products. Add what you run to find out whether that includes you.

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Every CVE for Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-1284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Mitsubishi
NVD analysis: Deferred
Record last updated: Nov 13, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES mitsubishi_electric:melsec_iq_f_series_fx5u_32mt_es (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS mitsubishi_electric:melsec_iq_f_series_fx5u_32mt_ds (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS mitsubishi_electric:melsec_iq_f_series_fx5u_32mt_ess (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS mitsubishi_electric:melsec_iq_f_series_fx5u_32mt_dss (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES mitsubishi_electric:melsec_iq_f_series_fx5u_32mr_es (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS mitsubishi_electric:melsec_iq_f_series_fx5u_32mr_ds (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES mitsubishi_electric:melsec_iq_f_series_fx5u_64mt_es (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS mitsubishi_electric:melsec_iq_f_series_fx5u_64mt_ds (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ESS mitsubishi_electric:melsec_iq_f_series_fx5u_64mt_ess (from the name)	all versions	CNA record
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DSS mitsubishi_electric:melsec_iq_f_series_fx5u_64mt_dss (from the name)	all versions	CNA record
1–10 of 60

References

References

https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-014_en.pdf	vendor-advisory
https://jvn.jp/vu/JVNVU92088475/	government-resource
https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-01	government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.