CVE-2025-10259 Denial-of-Service(DoS) Vulnerability in TCP Communication Function on MELSEC iQ-F Series CPU module
Remote attackers can cause a denial-of-service condition on Mitsubishi MELSEC iQ-F CPU modules by sending crafted TCP packets, disrupting specific connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-10259?
CVE-2025-10259 is a medium-severity denial of service vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/DS, published on 6 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-1284
Which versions are affected by CVE-2025-10259?
How do I fix CVE-2025-10259?
No fix has been published for CVE-2025-10259 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-10259 being exploited?
There is no known exploitation of CVE-2025-10259 in the wild and no public exploit code.
Sources
Also known as GHSA-8pxf-65qh-4qrc.