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

Published Nov 6, 2025
·
Updated

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.

Affected Software

84 affected components
Mitsubishi Electric MELSEC iQ-F Series CPU Module
: Mitsubishi Electric FX5U-32MT/ES
: Mitsubishi Electric FX5U-32MT/DS
: Mitsubishi Electric FX5U-32MT/ESS
: Mitsubishi Electric FX5U-32MT/DSS
: Mitsubishi Electric FX5U-64MT/ES
: Mitsubishi Electric FX5U-64MT/DS
: Mitsubishi Electric FX5U-64MT/ESS
: Mitsubishi Electric FX5U-64MT/DSS
: Mitsubishi Electric FX5U-80MT/ES
: Mitsubishi Electric FX5U-80MT/DS
: Mitsubishi Electric FX5U-80MT/ESS
: Mitsubishi Electric FX5U-80MT/DSS
: Mitsubishi Electric FX5U-32MR/ES
: Mitsubishi Electric FX5U-32MR/DS
: Mitsubishi Electric FX5U-64MR/ES
: Mitsubishi Electric FX5U-64MR/DS
: Mitsubishi Electric FX5U-80MR/ES
: Mitsubishi Electric FX5U-80MR/DS
: Mitsubishi Electric FX5UC-32MT/D
: Mitsubishi Electric FX5UC-32MT/DSS
: Mitsubishi Electric FX5UC-64MT/D
: Mitsubishi Electric FX5UC-64MT/DSS
: Mitsubishi Electric FX5UC-96MT/D
: Mitsubishi Electric FX5UC-96MT/DSS
: Mitsubishi Electric FX5UC-32MT/DS-TS
: Mitsubishi Electric FX5UC-32MT/DSS-TS
: Mitsubishi Electric FX5UC-32MR/DS-TS
: Mitsubishi Electric FX5UJ-24MT/ES
: Mitsubishi Electric FX5UJ-24MT/DS
: Mitsubishi Electric FX5UJ-24MT/ESS
: Mitsubishi Electric FX5UJ-24MT/DSS
: Mitsubishi Electric FX5UJ-40MT/ES
: Mitsubishi Electric FX5UJ-40MT/DS
: Mitsubishi Electric FX5UJ-40MT/ESS
: Mitsubishi Electric FX5UJ-40MT/DSS
: Mitsubishi Electric FX5UJ-60MT/ES
: Mitsubishi Electric FX5UJ-60MT/DS
: Mitsubishi Electric FX5UJ-60MT/ESS
: Mitsubishi Electric FX5UJ-60MT/DSS
: Mitsubishi Electric FX5UJ-24MR/ES
: Mitsubishi Electric FX5UJ-24MR/DS
: Mitsubishi Electric FX5UJ-40MR/ES
: Mitsubishi Electric FX5UJ-40MR/DS
: Mitsubishi Electric FX5UJ-60MR/ES
: Mitsubishi Electric FX5UJ-60MR/DS
: Mitsubishi Electric FX5UJ-24MR/ES-A
: Mitsubishi Electric FX5UJ-24MT/ES-A
: Mitsubishi Electric FX5UJ-40MR/ES-A
: Mitsubishi Electric FX5UJ-40MT/ES-A
: Mitsubishi Electric FX5UJ-60MR/ES-A
: Mitsubishi Electric FX5UJ-60MT/ES-A
: Mitsubishi Electric FX5S-30MT/ES
: Mitsubishi Electric FX5S-30MT/DS
: Mitsubishi Electric FX5S-30MT/ESS
: Mitsubishi Electric FX5S-30MT/DSS
: Mitsubishi Electric FX5S-40MT/ES
: Mitsubishi Electric FX5S-40MT/DS
: Mitsubishi Electric FX5S-40MT/ESS
: Mitsubishi Electric FX5S-40MT/DSS
: Mitsubishi Electric FX5S-60MT/ES
: Mitsubishi Electric FX5S-60MT/DS
: Mitsubishi Electric FX5S-60MT/ESS
: Mitsubishi Electric FX5S-60MT/DSS
: Mitsubishi Electric FX5S-80MT/ES
: Mitsubishi Electric FX5S-80MT/DS
: Mitsubishi Electric FX5S-80MT/ESS
: Mitsubishi Electric FX5S-80MT/DSS
: Mitsubishi Electric FX5S-30MR/ES
: Mitsubishi Electric FX5S-30MR/DS
: Mitsubishi Electric FX5S-40MR/ES
: Mitsubishi Electric FX5S-40MR/DS
: Mitsubishi Electric FX5S-60MR/ES
: Mitsubishi Electric FX5S-60MR/DS
: Mitsubishi Electric FX5S-80MR/ES
: Mitsubishi Electric FX5S-80MR/DS
: Mitsubishi Electric FX5S-30MR/ES-A
: Mitsubishi Electric FX5S-30MT/ES-A
: Mitsubishi Electric FX5S-40MR/ES-A
: Mitsubishi Electric FX5S-40MT/ES-A
: Mitsubishi Electric FX5S-60MR/ES-A
: Mitsubishi Electric FX5S-60MT/ES-A
: Mitsubishi Electric FX5S-80MR/ES-A
: Mitsubishi Electric FX5S-80MT/ES-A

Event History

Nov 6, 2025
CVE Published
via MITRE·07:12 AM
Data Sourced
via MITRE·07:12 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
DescriptionSeverityWeakness
Nov 14, 2025
Data Sourced
via ICS·03:17 AM
SeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2025-10259?

CVE-2025-10259 is classified as a denial-of-service vulnerability, allowing remote attackers to disrupt communication.

2

How do I fix CVE-2025-10259?

To mitigate CVE-2025-10259, ensure your MELSEC iQ-F Series CPU module firmware is updated to the latest version provided by Mitsubishi Electric.

3

What type of attacks can CVE-2025-10259 enable?

CVE-2025-10259 enables remote attackers to send crafted TCP packets that can disconnect communication, resulting in potential service interruptions.

4

Which devices are affected by CVE-2025-10259?

CVE-2025-10259 affects Mitsubishi Electric's MELSEC iQ-F Series CPU modules.

5

Is there a workaround for CVE-2025-10259?

While the best approach is to update firmware, temporarily limiting external access to the affected devices can reduce risk until a patch is applied.

Company

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